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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 20-F

Commission file number 1-15132

Securities registered or to be registered pursuant to Section 12(b) of the Act:

*Not for trading, but only in connection with the registration of American Depositary Shares, pursuant to the requirements of the Securities and Exchange Commission.

Securities registered or to be registered pursuant to Section 12(g) of the Act: None

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Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act: N/A

Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of the close of the period covered by the annual report:

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.

x Yes   o No

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934.

o Yes   x No

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

x Yes   o No

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

x Yes   o No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act, (Check one):

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing:

If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow.

o Item 17   x Item 18

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

o Yes   x No

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PART I

Item 1.           Identity of Directors, Senior Management and Advisers

Not applicable.

Item 2.           Offer Statistics and Expected Timetable

Not applicable.

Item 3.           Key Information

Selected Financial Data

We publish our financial statements in Mexican pesos.  Pursuant to Financial Reporting Standards (Normas de Información Financiera) accepted in Mexico, or Mexican NIF, financial data in the financial statements included in Items 3, 5 and 8 and, unless otherwise indicated, throughout this Form 20-F are stated in constant pesos as of December 31, 2007 for periods through and including December 31, 2007, and nominal pesos for periods beginning on or after January 1, 2008. Our financial statements for the year ended December 31, 2011 are subject to ratification by our shareholders at the next annual stockholders meeting.

This Form 20-F contains translations of certain peso amounts into U.S. dollars at specified rates solely for the convenience of the reader.  These translations should not be construed as representations that the peso amounts actually represent such U.S. dollar amounts or could be converted into U.S. dollars at the rate indicated.  Unless otherwise indicated, U.S. dollar amounts have been translated from Mexican pesos at an exchange rate of Ps. 13.6736 to U.S.$1.00, the exchange rate for pesos on January 3, 2012 as published by the Federal Reserve Board.  On March 23, 2012 the exchange rate for pesos, as published by the Federal Reserve Board was Ps. 12.81 to U.S.$1.00.

The following tables present a summary of our consolidated financial information and that of our subsidiaries for each of the periods indicated.  This information should be read in conjunction with, and is qualified in its entirety by reference to, our financial statements, including the notes thereto.  Our financial statements are prepared in accordance with Mexican NIF, which differs in certain significant respects from generally accepted accounting principles in the United States, or U.S. GAAP. Reconciliation to U.S. GAAP of net income and total stockholders’ equity is also provided in this summary financial data. Note 19 to our financial statements provides a description of the principal differences between Mexican NIF and U.S. GAAP as they relate to our business.

Under the provisions of Mexican NIF B-10 “Effects of inflation,” the Mexican economy is currently considered a non-inflationary environment, since accumulated inflation over the previous three years is below 26% (the higher limit for an economy to be considered non-inflationary). Consequently, as of January 1, 2008, companies are required to suspend recognition of the effects of inflation on the financial information (suspension of inflationary accounting).

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References in this annual report on Form 20-F to “dollars,” “U.S. dollars” or “U.S.$” are to the lawful currency of the United States of America.  References in this annual report on Form 20-F to “pesos” or “Ps.” are to the lawful currency of Mexico.  We publish our financial statements in pesos.

This annual report on Form 20-F contains references to “workload units,” which are units measuring an airport’s passenger traffic volume and cargo volume.  A workload unit currently is equivalent to one terminal passenger or 100 kilograms (220 pounds) of cargo.

The summary financial and other information set forth below reflects our financial condition, results of operations and certain operating data since the year ended December 31, 2007.

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(1)          Except for operating data.  Per share and per passenger peso amounts are expressed in pesos (not thousands of pesos).

(2)          Except for operating data.  Translated into dollars at the rate of Ps. 13.6736 per U.S. dollar, the Federal Reserve Board exchange rate for Mexican pesos at January 3, 2012.  Per share and per passenger dollar amounts are expressed in dollars (not thousands of dollars).

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(3)          Revenues from aeronautical services include those earned from passenger charges, landing charges, aircraft parking charges, charges for airport security services and charges for use of passenger walkways.

(4)          Revenues from non-aeronautical services are earned from the leasing of space in our airports, access fees collected from third parties providing services at our airports and miscellaneous other sources.

(5)          Since April 19, 1999, we have paid Inversiones y Tecnicas Aeroportuarias, S.A. de C.V. (“ITA”)  a technical assistance fee under the technical assistance agreement entered into in connection with the purchase by ITA of its Series BB shares.  This fee is described in “Item 7.  Major Shareholders and Related Party Transactions—Related Party Transactions—Arrangements with ITA.”

(6)          Each of our subsidiary concession holders is required to pay a concession fee to the Mexican government under the Mexican Federal Duties Law.  The concession fee is currently 5% of each concession holder’s gross annual regulated revenues from the use of public domain assets pursuant to the terms of its concession.

(7)          Non-ordinary items refer to restructuring and contract termination fees, personnel restructuring costs, insurance claims and loss on natural disasters.

(8)          Based on the ratio of 10 Series B shares per ADS.

(9)          Income tax was payable on the dividends because the distribution was not made from our after-tax earnings account.

(10)   Shares outstanding for all periods presented were 300,000,000.

(11)   In 2008, we adopted Mexican NIF B-2 “Cash-Flow” which requires us to present a statement of cash flows in place of a statement of changes in financial position.  The statement of cash flows classifies cash receipts and payments according to whether they stem from operating, investing or financing activities.

(12)   In 2010 we adopted Mexican Interpretacion de Norma de Informacion Financiera 17, or INIF 17, “Service Concession Contracts”, which provides that an operator of a service concession that is required to make capital improvements to concessioned assets, such as us, is deemed to provide construction or upgrade services.  See “Item 5.  Operating and Financial Review and Prospects — Recent Developments — Adoption of INIF 17”.   As a result, ASUR was required to reclassify all of its rights under fixed assets (including “Rights to use Airport Facilities, net” under “Airport Concessions, net” and to modify amortization rates in accordance with the remaining period of the concession, using the straight line method, for those fixed assets constructed or acquired in the past. Previously we amortized fixed assets based on the estimated remaining useful life of the particular asset.  As a result of this reclassification, “Depreciation and amortization” decreased because of an extension in the useful life of fixed assets, and income taxes increased as a result of an increase in our asset base, which is a factor in the calculation of the IETU.

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Exchange Rates

The following table sets forth, for the periods indicated, the high, low, average and period-end, free-market exchange rate expressed in pesos per U.S. dollar.  The average annual rates presented in the following table were calculated using the average of the exchange rates on the last day of each month during the relevant period.  The data provided in this table is based on noon buying rates published by the Federal Reserve Bank of New York for cable transfers in Mexican pesos for the periods ended December 31, 2007 through December 31, 2008.  The Federal Reserve Bank of New York discontinued the publication of foreign exchange rates on December 31, 2008, and therefore, the data provided for the periods beginning January 1, 2009 are based on the rates published by the U.S. Federal Reserve Board in its H.10 Weekly Release of Foreign Exchange Rates. We have not restated the rates in constant currency units.  All amounts are stated in pesos.  We make no representation that the Mexican peso amounts referred to in this annual report could have been or could be converted into U.S. dollars at any particular rate or at all.

(1)   Average of month-end rates or daily rates, as applicable.

(2)   Through March 23, 2012.

Source:  Federal Reserve Bank of New York noon buying rate (2007-2008); Federal Reserve Board H.10 Weekly Release (2009-2012).

Except for the period from September through December 1982, during a liquidity crisis, the Mexican Central Bank has consistently made foreign currency available to Mexican private-sector entities (such as us) to meet their foreign currency obligations.  Nevertheless, in the event of renewed shortages of foreign currency, there can be no assurance that foreign currency would continue to be available to private-sector companies or that foreign currency needed by us to service foreign currency obligations or to import goods could be purchased in the open market without substantial additional cost.

Fluctuations in the exchange rate between the peso and the U.S. dollar will affect the U.S. dollar value of securities traded on the Mexican Stock Exchange, and, as a result, will likely

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affect the market price of the ADSs.  Such fluctuations will also affect the U.S. dollar conversion by the depositary of any cash dividends paid in pesos.

On December 30, 2011, the Federal Reserve Board noon buying rate was Ps. 13.9510 per U.S.$1.00.  On March 23, 2012, the noon buying rate for pesos, as published by the Federal Reserve Board was Ps. 12.81 per U.S.$1.00.

For a discussion of the effects of fluctuations in the exchange rates between the peso and the U.S. dollar, see “Item 10.  Additional Information—Exchange Controls.”

Risk Factors

Risks Related to Our Operations

Hurricanes and other natural disasters have adversely affected our business in the past and could do so again in the future.

The southeast region of Mexico, like other Caribbean destinations, experiences hurricanes, particularly during the third quarter of each year.  Portions of the southeast region also experience earthquakes from time to time.  Natural disasters may impede operations, damage infrastructure necessary to our operations and/or adversely affect the destinations served by our airports.  Any of these events could reduce our passenger traffic volume.  The occurrence of natural disasters in the destinations we serve has adversely affected, and could in the future adversely affect, our business, results of operations, prospects and financial condition.  Some experts believe that climate change due to global warming could increase the frequency and severity of hurricanes in the future.  We have insured the physical facilities at our airports against damage caused by natural disasters, accidents or other similar events, but do not have insurance covering losses due to resulting business interruption.  Moreover, should losses occur, there can be no assurance that losses caused by damages to the physical facilities will not exceed the pre-established limits on the policies.

On October 21, 2005, Hurricane Wilma struck the Yucatan Peninsula, causing severe damage to the infrastructure of the Cancún and Cozumel airports and to our administrative office building in Cancún.  Cancún and Cozumel airports were closed for approximately 62 hours and 42 hours, respectively, and airport operations were disrupted for several weeks thereafter.  The hurricane also inflicted extensive damage on the hotel and tourist infrastructure in Cancún, the Mayan Riviera region and Cozumel, which led to sharply reduced air passenger traffic at our airports, especially in the fourth quarter of 2005 and during the first half of 2006.  During the fourth quarter of 2005, our passenger traffic decreased 33.1%, and revenues and operating income fell 32.6% and 86.5%, respectively, relative to the same period in 2004, reflecting the decline in passenger traffic.  Tourism in Cancún and the Mayan Riviera has by now largely recovered from Hurricane Wilma, and tourism in Cozumel continues to recover. More than 2.89 million cruise passengers visited Cozumel in 2011, which is one of the highest numbers in the last seven years, according to the Ministry of Communications and Transportation. Although tourism declined substantially in Cozumel after Hurricane Wilma in 2005, the numbers of tourists visiting Cozumel has since increased, in part due to the arrival of Royal Caribbean’s twin

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ships Oasis of the Seas and Allure of the Seas in 2010 and in part due to Cozumel and Mahahual again being perceived as safe cruise destinations.

Other hurricanes, such as Hurricane Dean in August 2007, Hurricane Emily in July 2005 and Hurricane Ivan in September 2004, have also affected our operations.

The effects of oil spills could adversely affect our business.

The Gulf of Mexico is the site of widespread deepwater oil drilling and extraction. Deepwater oil drilling inherently carries a number of significant risks.

On April 21, 2010, there was an explosion on the “Deepwater Horizon” drilling platform operated by BP in the Gulf of Mexico. The oil-drilling platform was located approximately 41 miles from the coast of Louisiana. The explosion and sinking of the platform caused a huge oil spill that spread along the U.S. coast in the Gulf of Mexico, and reached parts of Florida, Louisiana, Mississippi, Alabama and Texas. BP made several attempts to try to contain the spill and capture the oil. On September 19, 2010, the well was successfully plugged and declared “effectively dead.”

The oil spill has not affected the destinations served by our airports. However, if oil spills or similar disasters occur in the future, these destinations could be adversely affected, thereby reducing our volume of passenger traffic. Oil spills or other similar disasters in or around the destinations served by our airports could adversely affect our business, operating results, prospects and financial condition.

Our business could be adversely affected by a downturn in the U.S. economy.

In 2011, 61.4% of the international passengers served by our airports arrived or departed on flights originating in or departing to the United States.  Thus, our business is dependent on the condition of the U.S. economy, and is particularly influenced by trends in the United States relating to leisure travel, consumer spending and international tourism.  Events and conditions affecting the U.S. economy may adversely affect our business, results of operations, prospects and financial condition.  The U.S. economy recently experienced a recession.  In 2009 the U.S. gross domestic product decreased at an annualized real rate of 2.4%, during which time our international passenger traffic decreased 12.7%. In 2010 the U.S. economy showed improvement, with the gross domestic product increasing at an annualized real rate of 2.9%, and our international passenger traffic increasing 11.7%. In 2011, the recovery of the U.S. economy slowed slightly, with the gross domestic product increasing at an annualized real rate of 1.7% and our international passenger traffic increasing 2.6%.  However, some economists consider the economic recovery to be fragile.  In addition, concerns have been raised that the recent financial crisis in Europe may dampen economic activity, and therefore the economic recovery of the United States. As a result, these economists have suggested that there is risk of another recession, which would likely have a material adverse effect on our results of operations due to decreased passenger traffic from the United States.

Fluctuations in international petroleum prices could reduce demand for air travel.

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Fuel represents a significant cost for airlines. International prices of fuel have experienced significant volatility in recent years.  Most of our airline customers use kerosene-based jet fuel, the price of which is based upon the U.S. spot prices for that fuel plus the cost of transportation to each airport.  Although the U.S. Gulf Coast spot price for jet fuel has decreased from its high of U.S.$4.81 per gallon on September 12, 2008, it has continued to fluctuate in 2011 and has shown an overall upwards trend, with a low of U.S.$2.49 per gallon on January 4, 2011 and a high of U.S.$3.38 per gallon on April 08, 2011, according to the Energy Information Administration of the U.S. Department of Energy. Since April 2011, prices have stabilized, and as of March 20, 2012, the U.S. Gulf Coast spot price for jet fuel was $3.26 per gallon. Notwithstanding prices becoming more stable, the price of fuel may be subject to further fluctuations resulting from a reduction or increase in output of petroleum, voluntary or otherwise, by oil-producing countries, other market forces, a general increase in international hostilities, or any future terrorist attacks.  In addition, a number of airlines have engaged in hedging strategies with respect to fuel prices. In the event of a decline in oil prices, these hedging strategies may result in those airlines incurring significant derivative-related liabilities.  Increases in airlines’ costs may result in higher airline ticket prices and may decrease demand for air travel generally, thereby having an adverse effect on our revenues and results of operations.

The loss of one or more of our key customers could result in a loss of a significant amount of our revenues.

The global airline industry has recently experienced and continues to experience significant financial difficulties, marked by the filing for bankruptcy protection of several carriers and recent warnings regarding industry profitability.  In December 2011 the International Air Transport Association revised its 2011 financial forecast for the air transport industry, estimating net post-tax profits of U.S.$3.5 billion, down from U.S.$4.9 billion estimated in September 2011, due to the economic turmoil that would result from a failure of governments to resolve the Eurozone sovereign debt crisis in 2012. The forecast also indicated that operating margins were expected to exceed 1.4% in 2012.

Our business and results of operations could be adversely affected if we do not continue to generate comparable portions of our revenue from our key customers, including United Air Lines (previously United Air Lines and Continental Airlines) (which accounted for 4.9% of our revenues in 2010 and 5.4% in 2011), American Airlines (which accounted for 4.4% of our revenues in 2010 and 4.5% in 2011) and Aeromexico (4.0% of our revenues in 2010 and 5.4% in 2011).

On November 29, 2011, American Airlines Inc. and certain of their respective affiliates, the third largest U.S. carrier and the airline which accounted for 12.8% of our international passenger traffic in 2011, filed for bankruptcy protection in the U.S. As of the date of this report, American Airlines has announced that it intends to operate normally throughout the bankruptcy process and does not expect the restructuring to affect flight schedules. However, no assurances can be made that American Airlines will not reduce flight schedules or use the bankruptcy process to restructure its existing agreements with or obligations to us.

On August 2, 2010, Mexicana, one of Mexico’s two largest carriers and previously the airline which accounted for the largest share of our passenger traffic, filed for bankruptcy protection in

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Mexico and in the United States. On August 28, 2010, Mexicana, Mexicana Click, formerly known as Aerovías Caribe, and Mexicana Link (which we refer to collectively as “Grupo Mexicana”) ceased operations, and Mexicana Click and Mexicana Link filed for bankruptcy protection on September 7, 2010.  Since Grupo Mexicana ceased operations, approximately 88.9% of the routes that it flew have been taken over by other airlines, and passenger traffic levels at our airports have increased. Recent news reports suggest that it is unlikely that Mexicana will recommence operations.

We do not have contracts with any airlines that obligate them to continue providing service to our airports and we can offer no assurance that competing airlines would seek to increase their flight schedules if any of our key customers reduced their use of our airports.  Our current agreements with our principal airline customers expire in 2012 and we are currently renegotiating these in the normal course of business. We expect that we will continue to generate a significant portion of our revenues from a relatively small number of airlines in the foreseeable future.  Our business and results of operations could be adversely affected if we do not continue to generate comparable portions of our revenue from our key customers.

Furthermore, passenger charges, which accounted for 43.2% of our revenues in 2011, are collected by airlines from passengers on our behalf and are later paid to us 30 to 115 days following the date of each flight. If any of our key customers were to become insolvent or seek bankruptcy protection, we would be an unsecured creditor with respect to any unpaid passenger charges, and we might not be able to recover the full amount of such charges. As a result of the Grupo Mexicana bankruptcy, we estimate that Ps. 128.0 million in accounts receivable could be at risk of not being recovered, which represented approximately 21.6% of our total accounts receivable as of December 31, 2011. We are an unsecured creditor with respect to these amounts, and we cannot assure you how much, if any, of these amounts we will be able to recover.  Recent news reports suggest that it is unlikely that Mexicana will recommence operations and because of this, it is unlikely that we will recuperate the Ps. 128.0 million that we have reserved for unrecoverable accounts receivable from Mexicana.

In November 2011, American Airlines Inc. and certain of their respective affiliates filed for bankruptcy protection in the United States. As of the date of this report, American Airlines has continued to operate normally in our airports and we have continued to collect amounts due from it in compliance with existing contractual arrangements, and therefore we have not increased our reserve for doubtful accounts; however, we cannot assure you that American Airlines will continue to make payments during the pendency of its bankruptcy proceedings.

In addition, Mexican law prohibits an international airline from transporting passengers from one Mexican location to another (unless the flight originated outside Mexico), which limits the number of airlines providing domestic service in Mexico.  Accordingly, we expect to continue to generate a significant portion of our revenues from domestic travel from a limited number of airlines.

We could be subject to fines, penalties and other adverse consequences pending the outcome of our appeal against the Mexican government’s tax treatment of Airport Concessions at Cancún Airport.

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When bidding was concluded for the shares of the Mexican airport group that became ASUR, the Ministry of Communications and Transportation agreed that the concessionaire could amortize the value of the concession at an annual rate of 15% for tax purposes. Contrary to this decision, in February 2012, the Ministry of Finance determined that an assessment of Ps.865.3 million was due from our Cancún Airport subsidiary because it concluded that the amortization rate of 15% used to calculate amortization for 2006 and 2007 was invalid and that it should instead be 2.0%. We believe that the Ministry of Finance’s position is erroneous and expect to file an appeal in April 2012 to overturn this determination. Although we believe that we have a strong legal position, we can make no assurances that we will prevail in our appeal, and if we were to lose the appeal, the consequences could include fines, penalties and other adverse consequences, which we currently estimate would total Ps.334.2 million, which could have a material adverse effect on our results and balance sheet.

The adoption of IFRS may result in changes to our results of operations, balance sheet and statement of cash flows.

Pursuant to Mexican securities regulations, as of January 1, 2012, all Mexican publicly-reporting companies are required to prepare their financial statements in accordance with International Financial Reporting Standards, or IFRS. We adopted IFRS as our accounting standard for the fiscal year beginning January 1, 2012.  We have implemented the processes for the adoption of IFRS, which became effective for fiscal years beginning January 1, 2012, in accordance with the terms established by the National Banking and Securities Commission (Comisión Nacional Bancaria y de Valores).

Based on the analysis we have performed to date, we estimate that the most significant impacts of the adoption of IFRS based on our balance sheet as of December 31, 2011, would be adjustments to the following items: an increase of Ps. 3.5 million in deferred tax liability due to the impact on the deferred income tax and flat asset tax derived from the recognition of provisions for vacations and employee benefits and the determination that we must recognize both the income tax and the flat tax on profit in order to determine deferred taxes under the hybrid method based on net income projections; a reduction of Ps. 18.3 million in reserve for vacations due to the recognition of accrued vacation rights not used by year-end; a reduction of Ps. 2.9 million in deferred employee profit sharing due to the reversal of deferred employee profit sharing because it is outside the scope of International Accounting Standard (“IAS”) 12; a net increase of Ps. 7.8 million in labor liabilities due to the elimination of severance liabilities under Mexican NIF D-3 and the simultaneous creation of a liability under IAS 19; a reduction of Ps. 5.0 million in capital stock and Ps. 23. 0 million in the legal reserve due to the elimination of inflation accounting; and an increase of Ps. 5.1 million in the capital stock and legal reserve due to the reclassification of inflation accounting of capital stock and legal reserve to retained earnings.

The impact that the Company has estimated is based on IFRS standards and interpretations in effect as of December 31, 2011. If new IFRS are issued before the Company issues its first full set of audited IFRS financials, or if the Company decides to adopt early certain IFRS standards, or if the Company decides to take into account other accounting policies resulting from the completion of the process necessary for the adoption of IFRS, the estimated impact of IFRS on our balance sheet and results of operations could change. In addition, the

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adoption of IFRS could impact items in our balance sheet and results of operations that are used for the calculation of certain covenants in our contractual obligations and that determine the amounts of dividends we are permitted to pay.

The FAA could downgrade Mexico’s air safety rating again, which could result in a decrease in air traffic between the United States and our airports.

On July 30, 2010, the United States Federal Aviation Administration (“FAA”) announced that, following an assessment of Mexico’s civil aviation authority, it had determined that Mexico was not in compliance with international safety standards set by the International Civil Aviation Organization (ICAO), and, as a result, downgraded Mexico’s aviation safety rating from “Category 1” to “Category 2.” Under FAA regulations, because of this downgrade, Mexican airlines were not permitted to expand or change their current operations between the United States and Mexico except under certain limited circumstances, code-sharing arrangements between Mexican and U.S. airlines were suspended, and operations by Mexican airlines flying to the United States were subject to greater FAA oversight. These additional regulatory requirements resulted in reduced service between our airports and the United States by Mexican airlines or, in some cases, an increase in that cost of service, which resulted in a decrease in demand for travel between our airports and the United States. Approximately 2.9% of the passengers that traveled through our airports traveled on flights to or from the United States operated by Mexican airlines in 2011.

The FAA restored Mexico’s Category 1 rating on December 2, 2010. The FAA may downgrade Mexico’s air safety rating in the future, although we are unaware of any current plans to do so. We cannot predict what impact the downgrade of the Mexican aviation safety rating would have on our passenger traffic or results of operations, or on the public perception of the safety of Mexican airports.

Our business is highly dependent upon revenues from Cancún International Airport.

In 2011, Ps. 3,330.9 million (including construction services) or 72.8% of our revenues were derived from operations at Cancún International Airport.  During 2010 and 2011, Cancún International Airport represented 74.4% and 74.2%, respectively, of our passenger traffic and 46.8% and 48.0%, respectively, of our air traffic movements. The desirability of Cancún as a tourist destination and the level of tourism to the area are dependent on a number of factors, many of which are beyond our control.  For example, some media outlets continue to report an increase in the level of drug-related violence in Mexico.  Although these reports generally indicate that this increase in violence affects mostly cities in northern Mexico and the west coast of Mexico and is generally not directed at tourists, the reports may have created a perception that Mexico has become a less safe and secure place to visit.  In turn, we believe that it is possible that this perception has adversely affected the desirability of Cancún as a tourist destination.  We cannot assure you that tourism in Cancún will not decline in the future.  Any event or condition affecting Cancún International Airport or the areas that it serves could have a material adverse effect on our business, results of operations, prospects and financial condition.

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The September 11, 2001 terrorist attacks had a severe impact on the international air travel industry and adversely affected our business.  Similar events may do so again in the future.

The events of September 11, 2001 resulted in a significant decline in passenger traffic worldwide and future terrorist attacks could result in similar declines.

The terrorist attacks on the United States on September 11, 2001 had a severe adverse impact on the air travel industry, particularly on U.S. carriers and carriers operating international service to and from the United States.  Airline traffic in the United States fell precipitously after the attacks.  In Mexico, airline and passenger traffic decreased substantially, although the decrease was less severe than in the United States.  Our airports experienced a significant decline in passenger traffic following September 11, 2001.  Any future terrorist attacks, whether or not involving aircraft, will likely adversely affect our business, results of operations, prospects and financial condition.

Security enhancements have resulted in increased costs and may expose us to greater liability.

The air travel business is susceptible to increased costs resulting from enhanced security and higher insurance and fuel costs.  Following the events of September 11, we reinforced security at our airports.  For a description of the security measures that we adopted, see “Item 4.  Information on the Company—Business Overview—Non-Aeronautical Services—Airport Security.”  While enhanced security at our airports has not resulted in a significant increase in our operating costs to date, we may be required to adopt additional security measures in the future.  In addition, our general liability insurance premiums for 2002 increased substantially relative to our 2001 premiums and may rise again in the future.  Since October 2001, we carry a U.S.$50 million insurance policy covering liabilities resulting from terrorist acts.  Because our insurance policies do not cover losses resulting from war in any amount or from terrorism for amounts greater than U.S.$50 million, we could incur significant costs if we were to be directly affected by events of this nature.  While governments in other countries have agreed to indemnify airlines for liabilities they might incur resulting from terrorist attacks, the Mexican government has not done so and has given no indication of any intention to do the same.  In addition, fuel prices and supplies, which constitute a significant cost for airlines using our airports, may be subject to increases resulting from any future terrorist attacks, a general increase in international hostilities or a reduction in output of fuel, voluntary or otherwise, by oil producing countries.  Such increases in airlines’ costs have resulted in higher airline ticket prices and decreased demand for air travel generally, thereby having an adverse effect on our revenues and results of operations.  In addition, because a substantial majority of our international flights involve travel to the U.S., we may be required to comply with security directives of the U.S. Federal Aviation Authority, in addition to the directives of Mexican aviation authorities.

Mexican aviation authorities have adopted International Civil Aviation Organization guidelines requiring checked baggage on all international commercial flights beginning in January 2006 to undergo a new comprehensive screening process.  As of January 2006, we implemented the new screening system for all departing international flights, and we implemented the same system for domestic flights as of July 1, 2006 at all of our airports except Tapachula and Huatulco.  Although airlines, rather than holders of airport concessions, are

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responsible for baggage screening under Mexican law, we decided to purchase, install and operate the new screening equipment and supply this service to the airlines to facilitate their compliance with the new policy.  This could expose us to liability relating to the purchase, installation and operation of the equipment, or require us to purchase, install and operate additional equipment, if, among other possibilities, the new screening procedures were to fail to detect or intercept any attempted terrorist act occurring or originating at our airports. We cannot estimate the cost to us of any such liability, if any were to arise.

Interruptions in the proper functioning of information systems could disrupt operations and cause unanticipated increases in costs and/or decreases in revenues.

The proper functioning of our information systems is important to the successful operation of our business. If critical information systems fail or are otherwise unavailable, our ability to provide airport services at our airports, collect accounts receivable, pay expenses, and maintain our security and customer data, could be adversely affected. Currently, our information systems are protected with backup systems, including physical and software safeguards and a cold site to recover information technology operations. These safety components reduce the risk of disruptions, failures or security breaches of our information technology infrastructure and are reviewed periodically by external advisors. Nonetheless, any such disruption, failure or security breach of our information technology infrastructure, including our back-up systems, could have a negative impact on our operations.

International events could have a negative impact on international air travel and our business.

Historically, a majority of our revenues have been aeronautical services, and our principal source of aeronautical revenues is passenger charges.  Passenger charges are payable for each passenger (other than diplomats, infants, transfer and transit passengers) departing from the airport terminals we operate, collected by the airlines and paid to us.  In 2011, passenger charges represented 43.2% of our consolidated revenues.

International events such as the terrorist attacks on the United States on September 11, 2001, wars and public health crises such as Severe Acute Respiratory Syndrome (or “SARS”) and the Influenza A/H1N1 pandemic have disrupted the frequency and pattern of air travel worldwide in recent years.  Because our revenues are largely dependent on the level of passenger traffic in our airports, any general increase of hostilities relating to reprisals against terrorist organizations, further conflict in the Middle East, outbreaks of health epidemics such as Influenza A/H1N1, SARS, avian influenza or other events of general international concern (and any related economic impact of such events) could result in decreased passenger traffic and increased costs to the air travel industry and, as a result, could cause a material adverse effect on our business, results of operations, prospects and financial condition.

Our revenues are highly dependent on levels of air traffic, which depend in part on factors beyond our control.

Our revenues are closely linked to passenger and cargo traffic volumes and the number of air traffic movements at our airports.  These factors directly determine our revenues from aeronautical services and indirectly determine our revenues from non-aeronautical services.

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Passenger and cargo traffic volumes and air traffic movements depend in part on many factors beyond our control, including economic conditions in Mexico and the United States, the political situation in Mexico and elsewhere in the world, the attractiveness of our airports relative to that of other competing airports, fluctuations in petroleum prices (which can have a negative impact on traffic as a result of fuel surcharges or other measures adopted by airlines in response to increased fuel costs) and changes in regulatory policies applicable to the aviation industry.  Any decreases in air traffic to or from our airports as a result of factors such as these could adversely affect our business, results of operations, prospects and financial condition.

Our business is highly dependent upon the operations of Mexico City Area Airports.

In 2009, 2010 and 2011, approximately 69.6%, 63.7% and 69.6% respectively, of our domestic passengers flew to or from our airports via Mexico City International Airport.  As a result, our domestic traffic is highly dependent upon the operations of Mexico City International Airport.  In 2007, Mexico City International Airport opened Terminal 2 with 23 boarding gates with boarding bridges and three remote boarding gates served by buses, thus increasing its terminal capacity.  However, we cannot assure you that the airport’s operations will not decrease in the future, or that this capacity increase will result in an increase in passenger traffic at our airports. In 2011, domestic passenger traffic to and from Mexico City increased 18.1% as a result of low-cost airlines expanding their operations in Mexico City.

Additionally, Toluca International Airport, which is located approximately 64 km from Mexico City, has recently emerged as a complementary airport to Mexico City International Airport.  Toluca International Airport is largely served by low-cost airlines that cater to domestic leisure travelers, which we believe tend to be sensitive to both changes in the cost of air travel and economic conditions, and, to a lesser extent, business travelers.  In 2008, approximately 13.6% of our domestic passengers flew to or from our airports via Toluca International Airport.  However, beginning in 2009, the rising cost of fuel resulted in higher prices for air travel, which led to decreased passenger traffic from domestic leisure travelers.  In 2009, the percentage of domestic traffic in our airports traveling to and from Toluca decreased to 9.1%.  In addition, as a result of recent economic and other conditions in Mexico, we believe that discretionary spending on domestic travel in Mexico has decreased.  As a result of decreased domestic travel, passenger traffic to and from Toluca represented 9.5% of domestic passengers traveling through our airports in 2010, and decreased to 4.8% of domestic passengers in 2011, reflecting the migration of low-cost airlines to the Mexico City International Airport.  Any event or condition that adversely affects Mexico City International Airport or Toluca International Airport could adversely affect our business, results of operations, prospects and financial condition.

Competition from other tourist destinations could adversely affect our business.

One of the principal factors affecting our results of operations and business is the number of passengers using our airports.  The number of passengers using our airports may vary as a result of factors beyond our control, including the level of tourism in Mexico.  In addition, our passenger traffic volume may be adversely affected by the attractiveness, affordability and accessibility of competing tourist destinations in Mexico, such as Acapulco, Puerto Vallarta and Los Cabos, or elsewhere, such as Puerto Rico, Florida, Cuba, Jamaica, the Dominican Republic and other Caribbean islands and Central American destinations.  The attractiveness of the

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destinations we serve is also likely to be affected by perceptions of travelers as to the safety and political and social stability of Mexico.  There can be no assurance that tourism levels in the future will match or exceed current levels.

Revenues from passenger charges are not secured, and we may not be able to collect amounts invoiced in the event of the insolvency of one of its principal airline customers.

In recent years, many airlines have reported substantial losses.  Our revenues from passenger charges from our principal airline customers are not secured by a bond or any other collateral.  Thus, in the event of the insolvency of any of these airlines, we would not be assured of collecting any amounts invoiced to that airline in respect of passenger charges.

In August 2010, Grupo Mexicana filed for bankruptcy.  Grupo Mexicana owes Ps. 128.0 million of passenger charges to ASUR.  As a result of this bankruptcy, we increased our reserve for doubtful accounts by Ps. 128.0 million in 2010.  Recent news reports suggest that it is unlikely that Mexicana will recommence operations and because of this, it is unlikely that we will recuperate the Ps. 128.0 million that we have reserved for losses in connection with the Mexicana insolvency.

In November 2011, American Airlines Inc. and certain of their respective affiliates filed for bankruptcy protection in the United States. As of the date of this report, American Airlines has continued to operate normally in our airports and we have continued to collect amounts due from it in compliance with existing contractual arrangements, and therefore we have not increased our reserve for doubtful accounts; however, we cannot assure you that American Airlines will continue to make payments during the pendency of its bankruptcy proceedings.

If a change in relations with our labor force should occur, such a change could have an adverse impact on our results of operations.

Although we currently believe we maintain good relations with our labor force, if any conflicts with our employees were to arise in the future, including with our unionized employees (which accounted for approximately 38.6% of our total employees as of December 31, 2011), resulting events such as strikes or other disruptions that could arise with respect to our workforce could have a negative impact on our results of operations.

The operations of our airports may be disrupted due to the actions of third parties beyond our control.

As is the case with most airports, the operation of our airports is largely dependent on the services of third parties, such as air traffic control authorities and airlines.  We are also dependent upon the Mexican government or entities of the government for provision of services such as energy, supply of fuel to aircraft at our airports and immigration services for our international passengers.  We are not responsible for and cannot control the services provided by these parties.  Any disruption in or adverse consequence resulting from their services, including a work stoppage or other similar event, may have a material adverse effect on the operation of our airports and on our results of operations.

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Fernando Chico Pardo and Grupo ADO, S.A. de C.V., through their own investment vehicles and their interests in Inversiones y Tecnicas Aeroportuarias, S.A. de C.V., or ITA, have a significant influence as stockholders and over our management, and their interests may differ from those of other stockholders.

Entities directly or indirectly owned and controlled by Fernando Chico Pardo, who is also the chairman of our board of directors, own 16.48% of our total capital stock.  In addition, entities directly owned and controlled by Grupo ADO, S.A. de C.V. (“Grupo ADO”) own 16.33% of our total capital stock.

In addition, ITA, an entity, which is owned 51% by entities directly owned and controlled by Mr. Chico Pardo and 49% by entities directly owned and controlled by Grupo ADO, holds Series BB shares representing 7.65% of our capital stock. These Series BB shares provide it with special management rights.  For example, pursuant to our bylaws, ITA is entitled to present the board of directors the name or names of the candidates for appointment as chief executive officer, to remove our chief executive officer and to appoint and remove one half of the executive officers, and to elect two members of our board of directors.  Our bylaws also provide ITA veto rights with respect to certain corporate actions (including some requiring approval of our shareholders) so long as its Series BB shares represent at least 7.65% of our capital stock.  Mr. Chico Pardo and Grupo ADO have entered into a shareholders’ agreement that requires their unanimous consent to cause ITA to exercise certain of these rights.  Special rights granted to ITA are more fully discussed in “Item 10.  Additional Information” and “Item 7.  Major Shareholders and Related Party Transactions.”

Therefore, Mr. Chico Pardo and Grupo ADO are each able to exert a significant influence over our management and matters requiring the approval of our stockholders.  The interests of Mr. Chico Pardo, Grupo ADO and ITA may differ from those of our other stockholders, and there can be no assurance that any of Mr. Chico Pardo, Grupo ADO or ITA will exercise its rights in ways that favor the interests of our other stockholders.  In particular, Grupo ADO is a Mexican bus company that may directly or indirectly compete with our key airline customers in the Mexican transportation market. Furthermore, the concentration of ownership by Mr. Chico Pardo, Grupo ADO and the special rights granted to ITA may have the effect of impeding a merger, consolidation, takeover or other business combination involving ASUR.

Some of our board members and stockholders may have business relationships that may generate conflicts of interest.

Some of our board members or stockholders may have outside business relationships that generate conflicts of interest.  For example, Fernando Chico Pardo, the chairman of our board of directors and one of our principal stockholders, is a member of a number of other boards of directors that from time to time may have interests that diverge from our own. In addition, Grupo ADO, whose executives have been nominated to our board of directors and which is one of our principal stockholders operates a bus transportation business, and has other interests that may be different than ours. Conflicts may arise between the interests of these or other individuals in their capacities as our shareholders and/or directors, on the one hand, and their outside business interests on the other.  There can be no assurance that any conflicts of interest will not have an adverse effect on our shareholders.

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Our operations are at greater risk of disruption due to the dependence of most of our airports on a single commercial runway.

As is the case with many other domestic and international airports around the world, most of our airports have only one commercial aviation runway, although in the fourth quarter of 2009 we opened a second runway at Cancún International Airport.  While we seek to keep our runways in good working order and to conduct scheduled maintenance during off-peak hours, we cannot assure you that the operation of our runways will not be disrupted due to required maintenance or repairs.  In addition, our runways may require unscheduled repair or maintenance due to natural disasters, aircraft accidents and other factors that are beyond our control.  The closure of any runway for a significant period of time could have a material adverse effect on our business, results of operations, prospects and financial condition.

We are exposed to risk related to construction projects.

The building requirements under our master development programs could encounter delays or cause us to exceed our budgeted costs for such projects, which could limit our ability to expand capacity at our airports, increase our operating or capital expenses and could adversely affect our business, results of operations, prospects and financial condition.  Such delays or budgetary overruns also could limit our ability to comply with our master development programs.

In addition, in November 2008, as part of our purchase of 130 hectares of land in Huatulco for Ps. 286.3 million from the National Tourism Fund, or FONATUR, we agreed to construct at least 450 and up to 1,300 hotel rooms.  In connection with the construction of these hotel rooms, we have agreed to meet a series of construction milestones, including presentation of a master development plan, submission of architectural plans, application for environmental permits, commencement of construction and substantial completion of construction.  We have completed and presented a master development plan and FONATUR granted us an extension of time to submit architectural plans, now due on May 15, 2013.  For more information on the Huatulco development, please see “Item 4. Information on the Company — Business Overview — Other Properties”.  If we do not satisfy the remaining milestones within the allotted time (including any extensions) or we otherwise fail to satisfy them, we may be subject to penalties, including a fine of up to 6.5% of the amount we paid for the land, or Ps. 17.2 million, and the potential seizure by FONATUR of the land that we purchased.  We cannot assure you that FONATUR will grant future requests for extensions of time, or that we will be able to timely complete the required steps within their respective allotted time frames.

We are exposed to risk related to other business opportunities.

In July 2011, the Puerto Rico Ports Authority issued a request for proposals to bid on a concession to operate the Luis Munoz Marin Airport located in Carolina, Puerto Rico (“LMM Airport”) under the U.S. Federal Aviation Administration Airport Privatization Pilot Program. ASUR and Highstar Capital IV, L.P. (“Highstar”) have signed a memorandum of understanding, pursuant to which they have agreed to evaluate the possibility of making a joint bid for the concession. If we and Highstar pursue this acquisition, we could incur substantial additional debt to fund our portion of the concession fee and contingent liabilities related to the concession,

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which could in turn restrict our ability to pursue other important elements of our business strategy. Other risks and uncertainties related to our bid for the LMM Airport concession include the diversion of the attention of our senior management from the operation of our daily business; entering a new market in which we have limited experience; the potential adverse effect on our cash position as a result of all or a portion of our share of the concession fee being paid in cash; the revenues from the concession may not offset increased operating expenses associated with the concession; the future valuations of the concession may decrease from the concession fee that we paid; and the potential assumption of liabilities.  We may also explore other business opportunities from time to time, which may result in risks and uncertainties similar to those described above. Our inability to successfully manage the risks and uncertainties related to such business opportunities could have a material adverse effect on our revenues, expenses and net income.

We are exposed to risks inherent to the operation of airports.

We are obligated to protect the public at our airports and to reduce the risk of accidents.  As with any company dealing with members of the public, we must implement certain measures for the protection of the public, such as fire safety in public spaces, design and maintenance of car parking facilities and access routes to meet road safety rules.  We are also obligated to take certain measures related to aviation activities, such as maintenance, management and supervision of aviation facilities, rescue and fire-fighting services for aircraft, measurement of runway friction coefficients and measures to control the threat from birds and other wildlife on airport sites.  These obligations could increase our exposure to liability to third parties for personal injury or property damage resulting from our operations.

Our insurance policies may not provide sufficient coverage against all liabilities.

While we seek to insure all reasonable risks, we can offer no assurance that our insurance policies would cover all of our liabilities in the event of an accident, terrorist attack or other incident.  The markets for airport insurance and construction insurance are limited, and a change in coverage policy by the insurance companies involved could reduce our ability to obtain and maintain adequate or cost-effective coverage.  A certain number of our assets cannot, by their nature, be covered by property insurance (notably aircraft movement areas, and certain civil engineering works and infrastructure).  In addition, we do not currently carry business interruption insurance.

Risks Related to the Regulation of Our Business

The price regulatory system applicable to our airports imposes maximum rates for each airport.

The price regulatory system does not guarantee that our consolidated results of operations, or that the results of operations of any airport, will be profitable.

The system of price regulation applicable to our airports establishes an annual maximum rate for each airport, which is the maximum annual amount of revenues per workload unit (which is equal to one passenger or 100 kilograms (220 pounds) of cargo) that we may earn at that airport from services subject to price regulation.  The maximum rates for our airports have been

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determined for each year through December 31, 2013.  For a discussion of the framework for establishing our maximum rates and the application of these rates, see “Item 4. Information on the Company—Regulatory Framework—Price Regulation.” Under the terms of our concessions, there is no guarantee that the results of operations of any airport will be profitable.

Our concessions provide that an airport’s maximum rates will be adjusted periodically for inflation.  Although we are entitled to request additional adjustments to an airport’s maximum rates under certain circumstances, including the amendment of certain provisions of the Mexican Airport Law, our concessions provide that such a request will be approved only if the Ministry of Communications and Transportation determines that certain events specified in our concessions have occurred.  The circumstances under which we are entitled to an adjustment are described under “Item 4. Information on the Company—Regulatory Framework—Price Regulation—Special Adjustments to Maximum Rates.” There can be no assurance that any such request would be made or granted.

Our results of operations may be adversely affected by required efficiency adjustments to our maximum rates.

In addition, our maximum rates are subject to annual efficiency adjustments, which have the effect of reducing the maximum rates for each year to reflect projected efficiency improvements.  For the five-year term ending December 31, 2013, an annual efficiency adjustment factor of 0.70% was established by the Ministry of Communications and Transportation.  Future annual efficiency adjustments will be determined by the Ministry of Communications and Transportation in connection with the setting of each airport’s maximum rates every five years.  For a description of these efficiency adjustments, see “Item 4. Information on the Company—Regulatory Framework—Price Regulation—Methodology for Determining Future Maximum Rates.” We cannot assure you that we will achieve efficiency improvements sufficient to allow us to maintain or increase our operating income as a result of the progressive decrease in each airport’s maximum rate.

Our maximum rates and investment commitments will be adjusted if a concession is granted to construct the Mayan Riviera airport.

The Master Development Plans and maximum rates for each of our airports were approved on March 31, 2009, as of which date a concession for the Mayan Riviera airport had not been granted.  The Mayan Riviera airport is included in the National Infrastructure Plan for 2007-2012.  The bidding process for the concession for the airport was announced on May 11, 2010 and was cancelled on May 20, 2011 by the Ministry of Communications and Transportation.  To date, there has been no formal announcement on whether the Mayan Riviera Airport will move forward or not and, if so, when.  Because of uncertainty relating to the timing of the granting of the concession, the Ministry of Communications and Transportation did not account for any effects related to construction, administration and operation of the Mayan Riviera airport, and the beginning of flight operations there, on projected passenger traffic levels for Cancún airport.  However, within three months from the granting of a concession to operate the Mayan Riviera airport, the Ministry of Communications and Transportation has committed to revise the passenger traffic level projections for Cancún’s airport and to modify accordingly the Master Development Plan, investment obligations and maximum tariff that we are authorized to

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charge.  We cannot predict how the Ministry of Communications and Transportation will adjust Cancún’s Master Development Plan and Cancún’s maximum rate, whether these adjustments will be sufficient to account for the effects on projected traffic levels at Cancún airport, or whether these adjustments will be favorable at all.

The regulatory framework we are subject to could be changed in a way that adversely affects us.

On December 14, 2011, a bill was introduced in Mexico’s Congress to amend the Mexican Airport Law. The bill proposes that the Ministry of Communications and Transportation gain additional authority to plan and apply the standards, policies and programs for the Mexican airport system, to oversee the proper operation of civil aviation in Mexico and to establish rules for airport service providers and the general basis for flight schedules, so as to guarantee the competitiveness of Mexico’s airports. See “Item 5. Operating and Financial Review and Prospects — Recent Developments — A bill was introduced in Mexico’s Congress to amend the Mexican Airport Law.” The bill has been approved by the Senate and is currently being considered in the House of Deputies.

On October 1, 2007, the Chairman of the Federal Competition Commission (Comisión Federal de Competencia, or the “Competition Commission”) released an independent report on the competitiveness of Mexico’s airports relative to each other and to international airports.  Mexican legislators have proposed bills to enact the reforms proposed in the report previously. These bills have not been passed but we cannot guarantee that similar bills will not be introduced and passed in the future. We cannot predict whether any of these amendments will be adopted or, if adopted, the impact they would have on us, including whether these amendments would result in a change to our maximum rates.

Changes to Mexican laws, regulations and decrees applicable to us could have a material adverse impact on our results of operations.

The Mexican government has in the past implemented changes, and may in the future implement additional reforms, to the tax laws applicable to Mexican companies including ASUR.  The terms of our concessions do not exempt us from any changes to the Mexican tax laws.  Should the Mexican government implement changes to the tax laws that result in our having significantly higher income or asset tax liability, we will be required to pay the higher amounts due pursuant to any such changes, which could have a material adverse impact on our results of operations.  In addition, changes to the Mexican constitution or to any other Mexican laws could also have a material adverse impact on our results of operations.

Our concessions may be terminated under various circumstances, some of which are beyond our control.

We operate each of our airports under 50-year concessions granted as of 1998 by the Mexican government.  A concession may be terminated for a variety of reasons.  For example, a concession may be terminated if we fail to make the committed investments required by the terms of that concession.  In addition, in the event that we exceed the applicable maximum rate at an airport in any year, the Ministry of Communications and Transportation is entitled to reduce the applicable maximum rate at that airport for the subsequent year and assess a penalty.

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Violations of certain terms of a concession (including violations for exceeding the applicable maximum rate) can result in termination only if sanctions have been imposed for violation of the relevant term at least three times. Violations of other terms of a concession can result in the immediate termination of the concession. We would face similar sanctions for violations of the Mexican Airport Law or its regulations.  Although we believe we are currently complying with the principal requirements of the Mexican Airport Law and its regulations, we may not be in compliance with certain requirements under the regulations.  These violations could result in fines or other sanctions being assessed by the Ministry of Communications and Transportation, and are among the violations that could result in termination of a concession if they occur three or more times.  For a description of the consequences that may result from the violation of various terms of our concessions, the Mexican Airport Law or its regulations, see “Item 4. Information on the Company—Regulatory Framework—Penalties and Termination and Revocation of Concessions and Concession Assets.” Under applicable Mexican law and the terms of our concessions, our concessions may also be granted subject to additional conditions, which we may be unable to meet.  Failure to meet these conditions may also result in fines, other sanctions and the termination of the concessions.

In addition, the Mexican government may terminate one or more of our concessions at any time through reversion (rescate), if, in accordance with applicable Mexican law, it determines that it is required by national security or in the public interest to do so.  In the event of a reversion (rescate) of the public domain assets that are the subject of our concessions, such assets would revert to the Mexican government and the Mexican government under Mexican law would be required to compensate us, taking into consideration investments made and depreciation of the relevant assets, but not the value of the assets subject to the concessions, based on the methodology set forth in a reversion (rescate) resolution issued by the Mexican Ministry of Communications and Transportation.  There can be no assurance that we will receive compensation equivalent to the value of our investment in our concessions and related assets in the event of such a reversion (rescate).

In the event of war, natural disaster, grave disruption of the public order or an imminent threat to national security, internal peace or the economy, the Mexican government may carry out a requisition (requisa — step-in rights) with respect to our airports.  The step-in rights may be exercised by the Mexican government as long as the circumstances warrant.  In all cases, except international war, the Mexican government is required to indemnify us for damages and lost profits (daños y perjuicios) caused by such requisition, calculated at their real value (valor real); provided that if we were to contest the amount of such indemnification, the amount of the indemnity with respect to damages (daños) shall be fixed by expert appraisers appointed by us and the Mexican government, and the amount of the indemnity with respect to lost profits (perjuicios) shall be calculated taking into consideration the average net income during the year immediately prior to the requisition.  In the event of requisition due to international war, the Mexican government would not be obligated to indemnify us.

In the event that any one of our concessions is terminated, whether through reversion (rescate) or otherwise, our other concessions may also be terminated.  Thus, the loss of any concession would have a material adverse effect on our business and results of operations.  For a discussion of events which may lead to a termination of a concession, see “Item 4. Information on the Company—Regulatory Framework—Penalties and Termination and Revocation of

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Concessions and Concession Assets.” Moreover, we are required to continue operating each of our nine airports for the duration of our concessions, even if one or more of them are unprofitable.

The Mexican government could grant new concessions that compete with our airports, including the Cancún International Airport.

The Mexican government could grant additional concessions to operate existing government managed airports, or authorize the construction of new airports, that could compete directly with our airports.  In 2010, the Mexican government announced a bidding process to grant a concession for a new airport in the Mayan Riviera. The Mexican state of Quintana Roo formed a majority state-owned company to seek any such concession that may be granted. Three other companies, including ASUR, participated in the bidding process in 2010.  On January 31, 2011, the Federal Competition Commission (COFECO) issued an unfavorable decision regarding our participation in the bidding process for the construction, maintenance and operation of the Riviera Maya airport.  We disagreed with the decision and the views expressed by COFECO and on March 11, 2011, we initiated legal proceedings pursuant to established Mexican legislation to defend our right to participate in the bidding process.  These legal proceedings remain pending.  On May 20, 2011, we were notified by the Ministry of Communications and Transportation, through the Mexican Civil Aviation Authority, that the international public bidding process was cancelled because none of the technical bids presented by the participants complied with the requirements established in the bidding documents. If the bidding process is restarted, we may again be denied the right to participate if our legal proceedings are not resolved in our favor.  As a result, we are unable to estimate the potential financial impact, if any, that the decision will have on the future earnings of Cancún Airport.

Currently, the Mayan Riviera is served primarily by Cancún International Airport.  We are unable to predict the effect that the Mayan Riviera Airport may have on our passenger traffic or operating results.  Any competition from this or other such airports could have a material adverse effect on our business and results of operations.

In addition, in certain circumstances, the Mexican government can grant concessions without conducting the public bidding process.  Furthermore, the Federal Competition Commission has the power, under certain circumstances, to reject awards of concessions granted by the government.  Please see “Item 4.  Information on the Company—Regulatory Framework—Grants of New Concessions” below.  Grants of new concessions that compete with our airports could adversely affect our business, results of operations, prospects and financial condition.

We provide a public service regulated by the Mexican government and our flexibility in managing our aeronautical activities is limited by the regulatory environment in which we operate.

Our aeronautical fees charged to airlines and passengers are, like most airports in other countries, regulated.  In 2011, approximately 54.6% of our total revenues were earned from aeronautical services, which are subject to price regulation under our maximum rates.  These regulations may limit our flexibility in operating our aeronautical activities, which could have a

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material adverse effect on our business, results of operations, prospects and financial condition.  In addition, several of the regulations applicable to our operations and that affect our profitability are authorized (as in the case of our master development programs) or established (as in the case of our maximum rates) by the Ministry of Communications and Transportation for five-year terms.  Except under limited circumstances, we generally do not have the ability unilaterally to change our obligations (such as the investment obligations under our master development programs or the obligation under concessions to provide a public service) or increase our maximum rates applicable under those regulations should our passenger traffic or other assumptions on which the regulations were based change during the applicable term.  In addition, there can be no assurance that this price regulation system will not be amended in a manner that would cause additional sources of our revenues to be regulated.

We cannot predict how the regulations governing our business will be applied.

Many of the laws, regulations and instruments that regulate our business were adopted or became effective in 1999, and there is only a limited history that would allow us to predict the impact of these legal requirements on our future operations.  In addition, although Mexican law establishes ranges of sanctions that might be imposed should we fail to comply with the terms of one of our concessions, the Mexican Airport Law and its regulations or other applicable law, we cannot predict the sanctions that are likely to be assessed for a given violation within these ranges.  We cannot assure you that we will not encounter difficulties in complying with these laws, regulations and instruments.  Moreover, there can be no assurance that the laws and regulations governing our business will not change.

The Ministry of Communications and Transportation has announced that it intends to establish a new, independent regulatory agency to supervise the operation of our airports, as well as those of other airports that have been opened to private investment. Likewise, a recent bill in Mexico’s Congress proposes to establish a Federal Airport Services Commission.  For further information on this agency, see “Item 4. Information on the Company—Regulatory Framework—New Regulatory Agency.” We cannot predict whether or when this new agency will be organized, the scope of its authority, the actions that it will take in the future or the effect of any such actions on our business.

If we exceed the maximum rate at any airport at the end of any year, we could be subject to sanctions.

Historically, we have set the prices we charge for regulated services at each airport as close as possible to the prices we are allowed to charge under the maximum rate for that airport.  We expect to continue to pursue this pricing strategy in the future.  For example, in 2011, our revenues subject to maximum rate regulation represented 99.7% of the amount we were entitled to earn under the maximum rates for all of our airports.  There can be no assurance that we will be able to establish prices in the future that allow us to collect virtually all of the revenue we are entitled to earn from services subject to price regulation.

The specific prices we charge for regulated services are determined based on various factors, including projections of passenger traffic volumes, the Mexican producer price index (excluding petroleum) and the value of the peso relative to the U.S. dollar.  These variables are

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outside of our control.  Our projections could differ from the applicable actual data, and, if these differences occur at the end of any year, they could cause us to exceed the maximum rate at any one or more of our airports during that year.

If we exceed the maximum rate at any airport at the end of any year, the Ministry of Communications and Transportation may assess a fine and may reduce the maximum rate at that airport in the subsequent year.  The imposition of sanctions for violations of certain terms of a concession, including for exceeding the airport’s maximum rates, can result in termination of the concession if the relevant term has been violated and sanctions have been imposed at least three times.  In the event that any one of our concessions is terminated, our other concessions may also be terminated.

Depreciation of the peso may cause us to exceed our maximum rates.

We aim to charge prices that are as close as possible to our maximum chargeable rates, and we are entitled to adjust our specific prices only once every six months (or earlier upon a cumulative increase of 5% in the Mexican producer price index (excluding petroleum)).  However, we generally collect passenger charges from airlines 30 to 115 days following the date of each flight.  Such tariffs for the services that we provide to international flights or international passengers are generally denominated in U.S. dollars but are paid in Mexican pesos based on the average exchange rate for the month prior to each flight.  Accordingly, depreciation of the peso, particularly late in the year, could cause us to exceed the maximum rates at one or more of our airports, which could lead to the imposition of fines and the termination of one or more of our concessions.  The peso has recently experienced significant volatility, depreciating 29.4%, from 10.98 pesos per U.S. dollar on September 30, 2008 to 14.21 pesos per U.S. dollar on March 31, 2009.  Between March 31, 2009 and December 31, 2009, the peso fluctuated between Ps. 13.00 and Ps. 14.00 per U.S. dollar, and then began to appreciate. From December 31, 2009 to December 30, 2010, the peso appreciated by approximately 5.5%, from 13.06 pesos per U.S. dollar on December 31, 2009 to 12.35 pesos per U.S. dollar on December 30, 2010. From December 30, 2010 to December 30, 2011, the peso depreciated by approximately 13.1%, from 12.35 pesos per U.S. dollar on December 30, 2010 to 13.95 pesos per U.S. dollar on December 30, 2011.  On March 23, 2012, the exchange rate was Ps. 12.81 per U.S. dollar. In the event that any one of our concessions is terminated, our other concessions may also be terminated.

Risks Related to Mexico

Appreciation, depreciation or fluctuation of the peso relative to the U.S. dollar could adversely affect our results of operations and financial condition.

Following the devaluation of the peso in December 1994 and the resulting economic crisis in Mexico, the aggregate passenger traffic volume in our airports in 1995 decreased as compared to the prior year, reflecting a decrease in domestic passenger traffic volume that more than offset an increase in international passenger traffic volume.  In 2008, the peso decreased substantially in value against the U.S. dollar, and while the peso is currently gaining value against the dollar, it is possible that another substantial decrease in value could occur, which could (notwithstanding other factors) lead to a decrease in domestic passenger traffic that may not be offset by any increase in international passenger traffic.  Any future significant

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appreciation of the peso could impact our aggregate passenger volume by increasing the cost of travel for international passengers.  Depreciation of the peso could impact our aggregate passenger traffic volume by increasing the cost of travel for domestic passengers.

In addition, devaluation or depreciation of the peso against the U.S. dollar may adversely affect the dollar value of an investment in the ADSs and the Series B shares, as well as the dollar value of any dividend or other distributions that we may make.

As of December 31, 2011 less than 0.1% of our liabilities (approximately U.S.$1.8 million) were dollar-denominated. Although we currently intend to fund the investments required by our business strategy through cash flow from operations and from peso-denominated borrowings, we may incur dollar-denominated debt to finance all or a portion of these investments.  A devaluation of the peso would increase the debt service cost of any dollar-denominated indebtedness that we may incur and result in foreign exchange losses.

Severe devaluation or depreciation of the peso, or government imposition of exchange controls, may also result in the disruption of the international foreign exchange markets and may limit our ability to transfer or to convert pesos into U.S. dollars and other currencies.

Economic developments in Mexico may adversely affect our business and results of operations.

Although a substantial portion of our revenues is derived from foreign tourism, domestic passengers in recent years have represented approximately half of the passenger traffic volume in our airports.  In addition, all of our assets are located, and all of our operations are conducted, in Mexico.  As a result, our business, financial condition and results of operation could be adversely affected by the general condition of the Mexican economy, by a devaluation of the peso, by inflation and high interest rates in Mexico, or by political developments in Mexico.

Mexico has experienced adverse economic conditions.

In the past, Mexico has experienced economic crises, caused by internal and external factors, characterized by exchange rate instability (including large devaluations), high inflation, high domestic interest rates, economic contraction, a reduction of international capital flows, a reduction of liquidity in the banking sector and high unemployment rates.  We cannot assume that such conditions will not return or that such conditions will not have a material adverse effect on our business, financial condition or results of operations.

Mexico experienced a period of slow growth from 2001 through 2003, primarily as a result of the downturn in the U.S. economy.  In 2002, GDP grew by 0.9% and inflation reached 5.7%.  In 2003, GDP grew by 1.4% and inflation was 4.0%.  In 2004, GDP grew by 4.2% and inflation increased to 5.2%.  In 2005, GDP grew by approximately 2.8% and inflation decreased to 3.3%.  In 2006, GDP grew by approximately 4.8% and inflation reached 4.1%.  In 2007, GDP grew by approximately 3.3% and inflation declined to 3.8%. In 2008, GDP grew by approximately 1.3% and inflation increased to 6.5%.

However, Mexico began to enter a recession in the fourth quarter of 2008, during which GDP fell by approximately 1.6% and inflation increased by 2.5%. GDP fell by an additional 6.5% and inflation increased by an additional 3.6% in 2009.  In 2010, the Mexican economy

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began to recover, with GDP increasing by 5.5% and inflation remaining stable at 4.4%. In 2011, Mexican GDP increased 3.7% with inflation decreasing to 3.8%.

Mexico also has, and is expected to continue to have, high real and nominal interest rates.  The 28-day Interbank Equilibrium Interest Rate, or Tasa de Interés Interbancaria de Equilibrio (“TIIE”), as reported by the Banco de Mexico, averaged approximately 7.7%, 8.3%, 5.9%, 4.9% and 4.8% for 2007, 2008, 2009, 2010 and 2011, respectively.  As of March 26, 2012, the TIIE was 4.8%. All of our current peso-denominated debt is charged interest at a rate based on TIIE.  We have entered into hedging agreements for Ps. 600 million of peso-denominated debt; all of our remaining indebtedness remains unhedged.  We may be charged higher interest rates on our current unhedged peso-denominated debt or any peso-denominated debt we incur in the future.  For further detail regarding our hedging agreements, see “Item 5—Operating and Financial Review and Prospects—Liquidity and Capital Resources—Indebtedness.”

If the Mexican economy does not continue to recover, if inflation or interest rates increase significantly or if the Mexican economy is otherwise adversely impacted, our business, financial condition or results of operations could be materially and adversely affected.

Political conditions in Mexico could materially and adversely affect Mexican economic policy and, in turn, our operations.

National elections held on July 2, 2000 ended 71 years of rule by the Institutional Revolutionary Party (PRI) with the election of President Vicente Fox Quesada, a member of the National Action Party (PAN) and resulted in the increased representation of opposition parties in the Mexican Congress and in mayoral and gubernatorial positions.  This shift in political power has transformed Mexico from a one-party state to a pluralist democracy. On July 2, 2006, Felipe Calderon Hinojosa, also of the PAN, was elected to succeed President Fox. While no single party currently has a majority in the Congress or Senate, the Congressional elections in July 2009 resulted in the PRI more than doubling its presence in the lower chamber of Mexico’s Congress, winning 237 of the 500 seats.  National presidential and legislative elections are set to take place on July 1, 2012.  Multiparty rule is still relatively new in Mexico and could result in economic or political conditions that could materially and adversely affect our operations.  The lack of a majority party in the legislature and the lack of alignment between the legislature and the President could result in instability or deadlock.

Increased environmental regulation and enforcement in Mexico may affect us.

The level of environmental regulation in Mexico has significantly increased in recent years, and the enforcement of environmental laws is becoming substantially more stringent.  We expect this trend to continue and to be stimulated by international agreements between Mexico and the United States.  There can be no assurance that environmental regulations or their enforcement will not change in a manner that could have a material adverse effect on our business, results of operations, prospects or financial condition.

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Developments in other countries may affect the prices of securities issued by Mexican companies.

The Mexican economy may be, to varying degrees, affected by economic and market conditions in other countries.  Although economic conditions in other countries may differ significantly from economic conditions in Mexico, investors’ reactions to adverse developments in other countries may have an adverse effect on the market value of securities of Mexican issuers.  In October 1997, prices of both Mexican debt and equity securities decreased substantially as a result of the sharp drop in Asian securities markets.  Similarly, in the second half of 1998 and in early 1999, prices of Mexican securities were adversely affected by the economic crises in Russia and Brazil.  The Mexican debt and equities markets also have been adversely affected by ongoing developments in the global credit markets.

In addition, in recent years economic conditions in Mexico have become increasingly correlated with economic conditions in the United States as a result of NAFTA and increased economic activity between the two countries.  Therefore, adverse economic conditions in the United States, the termination of NAFTA or other related events could have a material adverse effect on the Mexican economy.  We cannot assure you that events in other emerging market countries, in the United States or elsewhere will not materially adversely affect our business, financial condition or results of operations.

Corporate disclosure.

A principal objective of the securities laws of the United States, Mexico, and other countries is to promote full and fair disclosure of all material corporate information, including accounting information.  However, there may be different or less publicly available information about issuers of securities in Mexico than is regularly made available by public companies in countries with highly developed capital markets, including the United States.

In addition, accounting standards and disclosure requirements in Mexico differ from those of the United States. In particular, our financial statements are prepared in accordance with Mexican NIF, which differs from U.S. GAAP in a number of respects. Note 19 to our financial statements provides a description of the principal differences between Mexican NIF and U.S. GAAP as they relate to us. Items on the financial statements of a company prepared in accordance with Mexican NIF may not reflect its financial position or results of operations in the way they would be reflected had such financial statements been prepared in accordance with U.S. GAAP.

Mexican law and our bylaws restrict the ability of non-Mexican shareholders to invoke the protection of their governments with respect to their rights as shareholders.

As required by Mexican law, our bylaws provide that non-Mexican shareholders shall be considered as Mexicans in respect of their ownership interests in ASUR and shall be deemed to have agreed not to invoke the protection of their governments in certain circumstances.  Under this provision, a non-Mexican shareholder is deemed to have agreed not to invoke the protection of his own government by asking such government to interpose a diplomatic claim against the Mexican government with respect to the shareholder’s rights as a shareholder, but is not deemed to have waived any other rights it may have, including any rights under the U.S. securities laws,

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with respect to its investment in ASUR. If you invoke such governmental protection in violation of this agreement, your shares could be forfeited to the Mexican government.

It may be difficult to enforce civil liabilities against us or our directors, officers and controlling persons.

ASUR is organized under the laws of Mexico, with its principal place of business (domicilio social) in Mexico City, and most of our directors, officers and controlling persons reside outside the United States.  In addition, all or a substantial portion of our assets and their assets are located outside of the United States.  As a result, it may be difficult for investors to effect service of process within the United States on such persons or to enforce judgments against them, including in any action based on civil liabilities under the U.S. federal securities laws. There is doubt as to the enforceability against such persons in Mexico, whether in original actions or in actions to enforce judgments of U.S. courts, of liabilities based solely on the U.S. federal securities laws.

The protections afforded to minority shareholders in Mexico are different from those in the United States.

Under Mexican law, the protections afforded to minority shareholders are different from those in the United States.  In particular, the law concerning fiduciary duties of directors is not as fully developed as in other jurisdictions, there is no procedure for class actions, and there are different procedural requirements for bringing shareholder lawsuits.  As a result, in practice it may be more difficult for minority shareholders of ASUR to enforce their rights against us or our directors or controlling shareholders than it would be for shareholders of a company incorporated in another jurisdiction, such as the United States.

Risks Related to Our ADSs

You may not be entitled to participate in future preemptive rights offerings.

Under Mexican law, if we issue new shares for cash as part of a capital increase, we generally must grant our shareholders the right to purchase a sufficient number of shares to maintain their existing ownership percentage in ASUR.  Rights to purchase shares in these circumstances are known as preemptive rights.  We may not legally be permitted to allow holders of ADSs in the United States to exercise any preemptive rights in any future capital increase unless we file a registration statement with the U.S. Securities and Exchange Commission, or SEC, with respect to that future issuance of shares, or the offering qualifies for an exemption from the registration requirements of the Securities Act of 1933, as amended.

At the time of any future capital increase, we will evaluate the costs and potential liabilities associated with filing a registration statement with the SEC and any other factors that we consider important to determine whether we will file such a registration statement.

We cannot assure you that we will file a registration statement with the SEC to allow holders of ADSs or shares in the United States to participate in a preemptive rights offering.  In addition, under current Mexican law, sales by the depository of preemptive rights and

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distribution of the proceeds from such sales to you, the ADS holders, is not possible.  As a result, your equity interest in ASUR may be diluted proportionately.

Holders of ADSs are not entitled to attend shareholders’ meetings, and they may only vote through the depositary.

Under Mexican law, a shareholder is required to deposit its shares with the Secretary of the Company, the S.D. Indeval Institución para el Depósito de Valores, S.A. de C.V., a Mexican or foreign credit institution or a brokerage house in order to attend a shareholders’ meeting. A holder of ADSs will not be able to meet this requirement, and accordingly is not entitled to attend shareholders’ meetings. A holder of ADSs is entitled to instruct the depositary as to how to vote the shares represented by ADSs, in accordance with the procedures provided for in the deposit agreement, but a holder of ADSs will not be able to vote its shares directly at a shareholders’ meeting or to appoint a proxy to do so.

Future sales of shares by us and our stockholders may depress the price of our Series B shares and ADSs.

On August 3, 2010, we filed a shelf registration statement with the U.S. Securities and Exchange Commission, which permits us or selling stockholders to offer, from time to time, Series B shares, directly or in the form of our ADSs. On August 17, 2010, JMEX B.V., which held approximately 16.1% of our capital stock, disposed of 100% of its holdings or 47,974,228 Series B shares, in an underwritten public offering at a price of U.S.$4.48 per Series B share. On November 7, 2011, Fernando Chico Pardo signed an agreement to sell 49% of ITA and 37,746,290 of his Series B shares to Grupo ADO, S.A. de C.V for an aggregate purchase price of $196,645,542.03.

Future sales of substantial amounts of our common stock or the perception that such future sales may occur, may depress the price of our ADSs and Series B shares. Although we and JMEX B.V. were subject to a lock-up in connection with the August 2010 sale, our other stockholders, directors and officers were not subject to any lock-up agreements, and as a result, they were able to freely transfer their Series B shares immediately following the offering. We, our stockholders, directors and officers may not be subject to lock-up agreements in future offerings of our common stock. Any such sale may lead to a decline in the price of our ADSs and Series B shares. We cannot assure you that the price of our ADSs and Series B shares would recover from any such decline in value.

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Forward Looking Statements

This Form 20-F contains forward-looking statements.  We may from time to time make forward-looking statements in our periodic reports to the Securities and Exchange Commission on Forms 20-F and 6-K, in our annual report to shareholders, in offering circulars and prospectuses, in press releases and other written materials and in oral statements made by our officers, directors or employees to analysts, institutional investors, representatives of the media and others.  Examples of such forward-looking statements include:

·                  projections of operating revenues, operating income, net income (loss), net income (loss) per share, capital expenditures, dividends, capital structure or other financial items or ratios,

·                  statements of our plans, objectives or goals,

·                  statements about our future economic performance or that of Mexico or other countries in which we operate, and

·                  statements of assumptions underlying such statements.

Words such as “believe,” “anticipate,” “plan,” “expect,” “intend,” “target,” “estimate,” “project,” “predict,” “forecast,” “guideline,” “should” and similar expressions are intended to identify forward-looking statements but are not the exclusive means of identifying such statements.

Forward-looking statements involve inherent risks and uncertainties.  We caution you that a number of important factors could cause actual results to differ materially from the plans, objectives, expectations, estimates and intentions expressed in such forward-looking statements.  These factors, some of which are discussed above under “Risk Factors,” include material changes in the performance or terms of our concessions, developments in legal proceedings, economic and political conditions and government policies in Mexico or elsewhere, inflation rates, exchange rates, regulatory developments, customer demand and competition.  We caution you that the foregoing list of factors is not exclusive and that other risks and uncertainties may cause actual results to differ materially from those in forward-looking statements.

Forward-looking statements speak only as of the date they are made, and we do not undertake any obligation to update them in light of new information or future developments.

Item 4.                       Information on the Company

History and Development of the Company

Grupo Aeroportuario del Sureste, S.A.B. de C.V., or ASUR, is a corporation (sociedad anónima bursátil de capital variable) organized under the laws of Mexico.  We were incorporated in 1998 as part of the Mexican government’s program for the opening of Mexico’s airports to private-sector investment.  The duration of our corporate existence is indefinite.  We are a holding company and conduct all of our operations through our subsidiaries.  The terms

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“ASUR,” “we” and “our” in this annual report refer both to Grupo Aeroportuario del Sureste, S.A.B. de C.V. as well as Grupo Aeroportuario del Sureste, S.A.B. de C.V. together with its subsidiaries.  Our registered office is located at Bosque de Alisos No. 47ª-4th Floor, Bosques de las Lomas, 05120 México, D.F., Mexico, telephone (5255) 5284 0408.

Investment by ITA

As part of the opening of Mexico’s airports to investment, in 1998, the Mexican government sold a 15% equity interest in us in the form of 45,000,000 Series BB shares to ITA pursuant to a public bidding process.

ITA paid the Mexican government a total of Ps. 1,165.1 million (nominal pesos, excluding interest) (U.S.$120.0 million based on the exchange rates in effect on the dates of payment) in exchange for:

·                  45,000,000 Series BB shares representing 15% of our outstanding capital stock (as of the date hereof, Series BB shares represent 7.65% of our outstanding capital stock following the conversion described below),

·                  three options to subscribe for newly issued Series B shares, all of which have expired unexercised, and

·                  the right and obligation to enter into various agreements with us and the Mexican government, including a participation agreement, a technical assistance agreement and a shareholders’ agreement under terms established during the public bidding process.  These agreements are described in greater detail under “Item 7. Major Shareholders and Related Party Transactions—Related Party Transactions.”

Under the technical assistance agreement, ITA provides management and consulting services and transfers industry “know-how” and technology to ASUR in exchange for a technical assistance fee.  This agreement is more fully described in “Item 7. Major Shareholders and Related Party Transactions—Related Party Transactions.”  The agreement provides us a perpetual and exclusive license in Mexico to use all technical assistance and “know-how” transferred to us by ITA or its stockholders during the term of the agreement.  The agreement has an initial fifteen-year term which expires in 2013, and is automatically renewed for successive five-year terms, unless one party provides the other a notice of termination within a specified period prior to a scheduled expiration date.  Although Copenhagen Airports A/S (“Copenhagen Airports”) sold its stake in ITA to Mr. Chico Pardo in October 2010, this technical assistance agreement continues in force. ITA provides us assistance in various areas, including strategic planning, financial analysis and control, development of our commercial activities, preparation of marketing studies focusing on increasing passenger traffic volume at our airports, political and regulatory issues, assistance with the preparation of the master development plans that we are required to submit to the Ministry of Communications and Transportation with respect to each of our airports, construction programming, exploring and analyzing new business opportunities, and the improvement of our airport operations.

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The technical assistance fee is equal to the greater of U.S.$2 million, adjusted for U.S. inflation, or 5% of our annual consolidated earnings before comprehensive financing cost, income taxes and depreciation and amortization (determined in accordance with Mexican NIF and calculated prior to deducting the technical assistance fee under this agreement).  The agreement was recently amended to provide for quarterly payments of the fee.  The fixed dollar amount decreased during the agreement’s initial five years.  The fixed dollar amount was U.S.$5.0 million in 1999 and 2000, and U.S.$3.0 million in 2001 and 2002.  Since 2003, the fixed dollar amount is U.S.$2.0 million before the annual adjustment for inflation (measured by the U.S. consumer price index) as from the first anniversary of the technical assistance agreement.  In 2011, the fixed amount, after the adjustment for inflation, was U.S.$2.72 million.  We believe that this structure creates an incentive for ITA to increase our annual consolidated earnings before net comprehensive financing cost, income and asset taxes and depreciation and amortization.  ITA is also entitled to reimbursement for the out-of-pocket expenses it incurs in its provision of services under the agreement.  In 2007, 2008, 2009, 2010 and 2011 the technical assistance costs were Ps. 91.95 million, Ps. 104.49 million, Ps. 103.52 million, Ps. 110.7 million, and Ps. 130.4 million respectively, greater than the fixed cost of Ps. 32.67 million, Ps. 33.12 million , Ps. 34.02 million, Ps. 32.34 million and Ps. 37.17 million respectively for the same periods.

The technical assistance agreement allows ITA, its stockholders and their affiliates to render additional services to ASUR only if the Acquisitions and Contracts Committee of our board of directors determines that these related persons have submitted the most favorable bid in a public bidding process involving at least three unrelated parties.  For a description of this committee, see “Item 6. Directors, Senior Management and Employees—Committees.”

Under our bylaws, the participation agreement and the technical assistance agreement, ITA has the right to elect two members of our board of directors (which currently consists of seven members) and their alternates, and to present the board of directors the name or names of the candidates for appointment as our chief executive officer, to remove our chief executive officer, and to appoint and remove half of our executive officers.  As the holder of the Series BB shares, ITA’s consent is also required to approve certain corporate matters so long as ITA’s Series BB shares represent at least 7.65% of our capital stock.  In addition, our bylaws, the participation agreement and the technical assistance agreement contain certain provisions designed to avoid conflicts of interest between ASUR and ITA.  The rights of ITA in our management are explained in “Item 6. Directors, Senior Management and Employees—Committees.”

The remaining 85% of our outstanding capital stock, which at that time (prior to the conversion in June 2007 by ITA of 22,050,000 Series BB shares into 22,050,000 Series B shares) consisted of 255,000,000 Series B shares, was sold by the Mexican government to a Mexican trust established by NAFIN.  This trust subsequently sold the shares it held in us to the public.  To our knowledge, the Mexican government no longer holds any of our shares.

ITA was restricted from transferring any of its remaining Series BB shares until December 18, 2008.  Currently, ITA may sell in any year up to 20% of its remaining ownership interest in us represented by Series BB shares.  Our bylaws provide that Series BB shares must

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be converted into Series B shares prior to transfer.  For a more detailed discussion of ITA’s rights to transfer its stock, see “Item 10.  Additional Information—Registration and Transfer.”

As required under the participation agreement entered into in connection with the Mexican government’s sale of the Series BB shares to ITA, ITA has transferred its Series BB shares to a trust, the trustee of which is Banco Nacional de Comercio Exterior, S.N.C (“Bancomext”).  Under the terms of the participation agreement and the trust agreement, ITA’s majority shareholder, currently Fernando Chico Pardo, is required to, directly or indirectly, maintain an ownership interest in ITA of a minimum of 51% prior to December 18, 2013 unless otherwise approved by the Ministry of Communications and Transportation.  To the extent that Mr. Chico Pardo acquires shares of ITA in excess of a 51% interest, this additional interest may be sold without restriction.  See “Item 7.  Major Shareholders and Related Party Transactions—Major Shareholders—ITA Trust and Shareholders’ Agreement” for a further description of these provisions.  There can be no assurance that the terms of the participation agreement or the trust would not be amended to reduce or eliminate these ownership commitments.  If ITA or its stockholder defaults on any obligation contained in the trust agreement, or if ITA defaults on any obligation contained in the participation agreement or the technical assistance agreement, after specified notice and cure provisions, the trust agreement provides that the trustee may sell 5% of the shares held in the trust and pay the proceeds of such sale to ASUR as liquidated damages.

Pursuant to the terms of the trust, ITA may direct the trustee to vote shares currently representing 7.65% of our capital stock, regarding all matters other than capital reductions, payment of dividends, amortization of shares and similar distributions to our shareholders, which are voted by the trustee in accordance with the vote of the majority of Series B shares. The trust does not affect the veto and other special rights granted to the holders of Series BB shares described in “Item 10. Additional Information.”

Currently, Fernando Chico Pardo, our Chairman, directly holds 51% of ITA’s shares.  The other 49% is held by an entity owned and controlled by Grupo ADO. Mr. Chico Pardo became a stockholder in ITA in April 2004 when he acquired the 24.5% ownership stake of French group Vinci, S.A. in ITA and a 13.5% ownership stake of the Spanish group Ferrovial Aeropuertos, S.A. in ITA.  At the same time, Copenhagen Airports acquired Ferrovial Aeropuertos, S.A.’s 11.0% ownership interest in ITA, thereby increasing its participation in ITA from 25.5% to 36.5%.  Mr. Chico Pardo acquired an additional 25.5% ownership stake in ITA through the exercise of his right of first refusal following the auction of such shares by NAFIN, a Mexican national credit institution and development bank controlled by the Mexican government.  On April 29, 2005, Copenhagen Airports increased its participation in ITA from 36.5% to 49% through the purchase of shares from Mr. Chico Pardo.

In connection with the tender offers and other transactions undertaken by Mr. Chico Pardo in June 2007, ITA converted 22,050,000 Series BB shares representing 7.35% of our total outstanding capital stock into Series B shares and transferred such shares to Agrupación Aeroportuaria Internacional, S.A. de C.V. by means of a spin-off.  As a result of this transaction ITA currently holds 22,950,000 Series BB shares representing 7.65% of our total outstanding capital stock.  See “Item 7. Major Shareholders and Related Party Transactions—Major Shareholders—Tender Offer by Fernando Chico Pardo”.

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On October 13, 2010, Copenhagen Airports consummated the sale of its 49% stake in ITA to Mr. Chico Pardo. As a result of this transaction, Mr. Chico Pardo became the direct or indirect owner of 100% of the shares of ITA.  On January 4, 2012, Fernando Chico Pardo consummated the sale of an entity that owns and controls 49% of the shares of ITA to Grupo ADO. See “Item 7. Major Shareholders and Related Party Transactions—Purchase and subsequent sale of 49% of ITA by Fernando Chico Pardo.”

Mr. Chico Pardo is the founder and President of Promecap, S.C.  He serves as a board member of various organizations, including ITA, Grupo Posadas, Grupo Carso, Sanborns Hermanos, Sears Roebuck de Mexico and Grupo Financiero BBVA Bancomer, Bombardier, Inc. and Grupo Azucarero Mexicano (GAM).

Master Development Programs

Under the terms of our concessions, each of our subsidiary concession holders is required to submit an updated master development plan for approval by the Ministry of Communications and Transportation every five years.  Each master development plan covers a fifteen-year period and includes investment commitments for the regulated part of our business (including certain capital expenditures and improvements) for the succeeding five-year period and investment projections for the regulated part of our business (including certain capital expenditures and improvements) for the remaining ten years (indicative investments).  Once approved by the Ministry of Communications and Transportation, these commitments become binding obligations under the terms of our concessions.  Committed investments are minimum requirements, and our capital expenditures may exceed our investment commitments in any period.  On March 31, 2009, the Ministry of Communications and Transportation approved each of our current updated master development plans.  These plans are in effect from January 1, 2009 to December 31, 2013.

The following table sets forth our committed investments for the regulated part of our business for each airport pursuant to the terms of our current master development plans for the periods presented.  Even though we have committed to invest the amounts in the table, those amounts could be lower or higher depending on the cost of each project.

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Committed Investments

(1)                                  Based on the Mexican construction price index in accordance with the terms of our master development plan.

(2)                                  Prior to December 31, 2008, we invested a total of Ps. 1,667.7 million in the construction of Terminal 3 and the construction of the second runway at Cancún International Airport.  As a result, the Ministry of Communications has applied Ps. 1,054.8 million of this amount to the satisfaction of our committed investments at Cancún International Airport for 2009 through 2013, of which approximately Ps. 211 million was allocated to each calendar year.  The amounts reflected above are the total amount of committed investments, and do not include deductions for these amounts.

The following table sets forth our committed and indicative investments for the regulated part of our business for each airport pursuant to the terms of our current master development plans for the periods presented.

(1)                                  Based on the Mexican construction price index in accordance with the terms of our master development plan.

(2)                                  Prior to December 31, 2008, we invested a total of Ps. 1,667.7 million in the construction of Terminal 3 and the construction of the second runway at Cancún International Airport.  As a result, the Ministry of Communications has applied Ps. 1,054.8 million of this amount to the satisfaction of our committed investments at Cancún International Airport for 2009 through 2013, and Ps. 612.9 million to the satisfaction of our indicative investments for 2014 through 2018.  The amounts reflected above are the total amount of committed and indicative investments, and do not include deductions for these amounts.

BUSINESS OVERVIEW

We hold concessions to operate, maintain and develop nine airports in the southeast region of Mexico for fifty years from November 1, 1998.  As operators of these airports, we charge airlines, passengers and other users fees for the use of the airports’ facilities.  We also derive rental and other income from commercial activities conducted at our airports, such as the leasing of space to restaurants and retailers.  Our concessions include the concession for Cancún International Airport, the second busiest airport in Mexico in 2011 in terms of passenger traffic, and the first busiest in terms of international passengers in regular service, according to the Dirección General de Aeronáutica Civil, or General Office of Civil Aviation, Mexico’s federal

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authority on aviation.  We also hold concessions to operate the airports in Cozumel, Huatulco, Mérida, Minatitlán, Oaxaca, Tapachula, Veracruz and Villahermosa.

Mexico is one of the main tourist destinations in the world.  Mexico has historically ranked in the top ten countries worldwide in terms of foreign visitors, with approximately 22.7 million visitors in 2011, according to the Mexican Ministry of Tourism.  Within Latin America and the Caribbean, Mexico ranked first in 2011 in terms of number of foreign visitors and income from tourism, according to the World Tourism Organization.  The tourism industry is one of the largest generators of foreign exchange in the Mexican economy.  Within Mexico, the southeast region (where our airports are located) is a principal tourist destination due to its beaches and cultural and archeological sites, which are served by numerous hotels and resorts.

Cancún and its surroundings were the most frequently visited international tourism destination in Mexico in 2011, according to the Mexican Ministry of Tourism.  Cancún International Airport represented 71.9%, 74.4% and 74.2% of our passenger traffic volume and 77.3%, 78.6% and 72.8% of our revenues in 2009, 2010 and 2011, respectively.  At December 31, 2011, Cancún had approximately 28,225 hotel rooms, according to the Mexican Ministry of Tourism.  We believe that Cancún International Airport is positioned to benefit from its proximity to the Mayan Riviera, a 129-kilometer (80-mile) stretch of coastal resorts and hotels that is among Mexico’s most rapidly developing tourism areas.  According to the Mexican National Trust for Tourism Development, the Mayan Riviera had approximately 40,000 hotel rooms as of December 31, 2011.

Our airports served approximately 15.5 million passengers in 2009, approximately 16.7 million passengers in 2010 and approximately 17.5 million passengers in 2011.  For year-by-year passenger figures, see “—Our Airports.”

The United States currently is a significant source of passenger traffic volume in our airports.  In 2009, 2010 and 2011 international passengers represented 56.6%, 58.8% and 57.5% respectively, of the total passenger traffic volume in our airports.  In 2009, 2010 and 2011, 66.1%, 63.1% and 61.4% respectively, of the international passengers in our airports traveled on flights originating in or departing to the United States.  As of December 31, 2011, 8 Mexican and 74 international airlines, including U.S.-based airlines such as American Airlines and United Air Lines (previously United Air Lines and Continental Airlines), were operating directly or through code-sharing arrangements (where one aircraft has two or more flight numbers of different, allied airlines) in our airports.

The following table sets forth our revenues for the period presented.

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(1)               In 2010 we adopted Mexican INIF 17, “Service Concession Contracts,” which provides that an operator of a service concession that is required to make capital improvements to concessioned assets, such as us, is deemed to provide construction or upgrade services. As a result, we are required to account for the revenues and expenses relating to those services. In our case, because we hire a third party to provide construction and upgrade services, our revenues relating to construction or upgrade services are equal to our expenses for those services.  See “Item 5.  Operating and Financial Review and Prospects — Recent Developments — Adoption of INIF 17”.

Aeronautical Services

Aeronautical services represent the most significant source of our revenues. All of our revenues from aeronautical services are regulated under the “dual-till” price regulation system applicable to our airports.

Our revenues from aeronautical services are derived from: passenger charges, landing charges, aircraft parking charges, charges for the use of passenger walkways and charges for the provision of airport security services.  Charges for aeronautical services generally are designed to compensate an airport operator for its infrastructure investment and maintenance expense.  Aeronautical revenues are principally dependent on three factors: passenger traffic volume, the number of air traffic movements and the weight of the aircraft. In 2009, 2010 and 2011, 65.2%, 53.9% and 54.6% of our consolidated revenues, respectively, were derived from Aeronautical services.

Passenger Charges

We collect a passenger charge for each departing passenger on an aircraft (other than diplomats, infants and transfer and transit passengers).  We do not collect passenger charges from arriving passengers.  Passenger charges are automatically included in the cost of a passenger’s ticket and generally collected twice monthly from each airline.  As of December 2011, the charge for international passengers was U.S.$21.55 for the Minatitlán and Oaxaca Airports, U.S.$21.64 for Tapachula and Villahermosa Airports, U.S.$29.73, U.S.$25.69, U.S.$23.71, U.S.$21.17 and U.S.$20.74 for Cozumel, Mérida, Veracruz, Cancún and Huatulco Airports respectively, the charge for domestic passengers was Ps.487.07, Ps.422.41, Ps.268.47, Ps.248.28, Ps.245.69, Ps.199.57, Ps.199.14, Ps.198.71 and Ps.181.08 (nominal pesos) for the Tapachula, Minatitlán, Cozumel, Oaxaca, Mérida, Veracruz, Huatulco, Villahermosa and Cancún Airports, respectively. International passenger charges are currently dollar-denominated, but generally collected in pesos based on the average exchange rate during the month prior to the flight.  Domestic passenger charges are peso-denominated.  In each of 2009, 2010 and 2011, passenger charges represented 79.1%, 78.4% and 79.0% respectively of our aeronautical revenues and 51.6%, 42.3% and 43.2% respectively, of our total consolidated revenues.  From time to time we have offered discounts on passenger charges at certain of our airports.

Aircraft Landing and Parking Charges, Passenger Walkway Charges and Airport Security Charges

We collect various charges from carriers for the use of our facilities by their aircraft and passengers.  For each aircraft’s arrival, we collect a landing charge that is based on the average of the aircraft’s maximum takeoff weight and the aircraft’s weight without fuel.  We also collect aircraft parking charges based on the time an aircraft is at an airport’s gate or parking position.  Parking charges at several of our airports vary based on the time of day that the relevant service is provided (with higher fees generally charged during peak usage periods at certain of our

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airports).  We collect aircraft parking charges the entire time an aircraft is on our aprons.  Airlines are also assessed charges for the connection of their aircraft to our terminals through a passenger walkway.  We also assess an airport security charge, which is collected from each airline based on the number of its departing passengers.  We provide airport security services at our airports through third-party contractors.  We also provide firefighting and rescue services at our airports.

Non-aeronautical Services

General

Non-aeronautical services have historically generated a proportionately smaller portion of our revenues.  Our revenues from non-aeronautical services are derived from commercial activities (such as the leasing of space in our airports to retailers, restaurants, airlines and other commercial tenants) and access fees charged to providers of complementary services in our airports (such as catering, handling and ground transport).  In 2009, 2010 and 2011, 30.1%, 24.6% and 26.0% of our consolidated revenues, respectively, were derived from commercial revenues as defined under the Mexican Airport Law.

Currently, the leasing of space in our airports to airlines and other commercial tenants represents the most significant source of our revenues from non-aeronautical services.  Although certain of our revenues from non-aeronautical services are regulated under our “dual-till” price regulation system, our revenues from commercial activities (other than the lease of space to airlines and other airport service providers that is considered essential to an airport) are not regulated.

Commercial Activities

Leading international airports generally generate an important portion of their revenues from commercial activities.  An airport’s revenues from commercial activities is largely dependent on passenger traffic, its passengers’ level of spending, terminal design, the mix of commercial tenants and the basis of fees charged to businesses operating in the airport.  Revenues from commercial activities also depend substantially on the percentage of traffic represented by international passengers due to the revenues generated from duty-free shopping.

In 2002, we opened 40 new commercial spaces in six of our airports, including new duty-free shops, restaurants, bank and foreign exchange services, and convenience stores.  In 2003 we continued developing commercial activity in our airports by opening new bars and restaurants in six of our airports and new retail stores in seven of our airports, as well as dedicating additional space to advertising in our Cancún airport.  We opened 13 new retail stores in our Cancún, Mérida and Oaxaca airports in 2004, and 16 new retail stores at the Cancún, Cozumel, Villahermosa, Oaxaca and Minatitlán airports in 2005.

In 2006, we opened 11 new retail stores in our Cancún, Mérida, Oaxaca, Villahermosa and Huatulco airports, and also entered into long-term agreements relating to commercial activities in Cancún International Airport’s new Terminal 3, including an agreement with Aldeasa México, S.A. de C.V. for the operation of the duty-free shops until 2017 and for

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extensions on existing facility leases in Cancún International Airport’s Terminal 2, Cozumel, and Mérida.  We also entered into a ten-year agreement with AB T3, S.A. de C.V. to provide food and beverage services at Cancún International Airport’s new Terminal 3.  The facilities at Terminal 3 include food and beverage retail space comprising a total of 10 units, with brands and concepts aimed at providing the airport’s international passengers with world-class service.  Additionally, Hoteleria e Inmobiliaria S.A. de C.V. assumed responsibility for the operation of the restaurant and snack bar at the Cancún airport’s Terminal 2 that were previously operated directly by the Cancún airport.

In 2007, we opened 21 new retail stores in Cancún International Airport, mostly in connection with the opening of the new Terminal 3, including restaurants, gift shops, a duty free shop, a drugstore, a convenience store, an exchange booth, and a spa.  We also opened one new retail store at each of the Mérida, Veracruz, and Villahermosa airports.  In addition, in July 2007, we signed a five-year agreement with Banco Santander to install and operate branches at the Cancún, Mérida, and Veracruz airports, and to install ATMs at the Cozumel, Huatulco, Minatitlán, Oaxaca, Tapachula, and Villahermosa airports.  In 2008, we opened one new store in Cancún airport.  In 2009, we opened one new store in Cancún International Airport as well as car rental locations at Cancún, Mérida, Tapachula and Veracruz airports. In 2010, we opened 20 commercial spaces and closed eight commercial spaces for a net increase of 12 commercial spaces (including retail, convenience stores and foreign exchange services), including seven in Cancún, two in each of Veracruz, Villahermosa, Oaxaca, Merida and Huatulco, and one in each of Cozumel, Minatitlan and Tapachula.  In 2011, we opened nine commercial spaces, including six in Cancún, one in Cozumel, one in Minatitlán and one in Tapachula.

We estimate that prior to 2000, revenues from commercial activities in our terminals accounted for less than 15% of the total revenues generated by our airports. In contrast, we believe that revenues from commercial activities account for 25% or more of the consolidated revenues of many leading international airports. Accordingly, a significant part of our business strategy is focused on increasing our revenues from commercial activities in our airports.

Within our nine airports, we leased approximately 221 commercial premises as of December 31, 2011, including restaurants, banks, retail outlets (including duty-free stores), currency exchange bureaus and car rental agencies.  Our most important tenants in terms of occupied space and revenue in 2011 were Aldeasa and Controladora Mera and its affiliates.  Generally, concessionaires pay a monthly fee based on the higher of a fixed amount or a percentage of their revenues.

Access Charges

At each of our airports, we earn revenues from charging access fees to various third-party providers of complementary services, including luggage check-in, sorting and handling, aircraft servicing at our gates, aircraft cleaning, cargo handling, aircraft catering services and assistance with passenger boarding and deplaning.  Our revenues from access charges are regulated under our “dual-till” price regulation system.  Under current regulations, each of these services may be provided by the holder of an airport concession, by a carrier or by a third party hired by a concession-holder or a carrier.  Typically, these services are provided by third parties, whom we charge an access fee based on a percentage of revenues that they earn at our airports.  Under the

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Mexican Airport Law, third-party providers of complementary services are required to enter into agreements with the respective concession holder at that airport.  Seven different contractors provide handling services at our nine airports.

Consorcio Aeromexico, the parent of the Aeromexico airline, owns Administradora Especializada en Negocios S.A de C.V, or “Administradora Especializada,” the successor company to Servicios de Apoyo en Tierra, or “SEAT,” a company that provides certain complementary services, such as baggage handling, to various carriers at airports throughout Mexico. SEAT operated at our airports prior to our commencement of operations under our concessions and continues to do so through its successor company.

Under the Mexican Airport Law, we are required to provide complementary services at each of our airports if there is no third party providing such services.  Administradora Especializada is currently the sole provider of baggage handling services at all of our airports except for Tapachula airport.  If Administradora Especializada ceased to provide such services directly, we could be required to provide these services or find a third party to provide them.

Automobile Parking and Ground Transport

Each of our airports has public car parking facilities consisting of open-air parking lots.  The only airport at which we do not charge parking fees is Cozumel.  Revenues from parking at our airports currently are not regulated, although they could become regulated upon a finding by the Mexican Competition Commission that there are no competing alternatives.

We collect revenues from various commercial vehicle operators, including taxi, bus and other ground transport operators.  Our revenues from permanent providers of ground transport services, such as access fees charged to taxis, are regulated activities, while our revenues from non-permanent providers of ground transport services, such as access fees charged to charter buses, are not regulated revenues.  In October 2007, we entered into new concession agreements with car rental companies, which had better economic terms than the previous concession agreements.  These concession agreements expire in 2012 and are currently in the process of being renegotiated.

Airport Security

The Dirección General de Aeronáutica Civil, or General Office of Civil Aviation, Mexico’s federal authority on aviation, and the Office of Public Security issue guidelines for airport security in Mexico.  At each of our airports, security services are provided by independent security companies that we hire.  In recent years, we have undertaken various measures to improve the security standards at our airports.  These measures included increasing the responsibilities of the private security companies that we hire, the implementation, in accordance with regulations issued by the International Civil Aviation Organization (ICAO), of integrated computer tomography and baggage detection system for international and domestic flights to detect explosive traces, the modernization of our carry-on luggage scanning and security equipment, the implementation of strict access control procedures to the restricted areas of our airports and the installation of a closed-circuit television monitoring system in some of our airports.

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In response to the September 11, 2001 terrorist attacks in the United States, we have taken additional steps to increase security at our airports.  At the request of the Transportation Security Administration of the United States, the General Office of Civil Aviation issued directives in October 2001 establishing new rules and procedures to be adopted at our airports.  Under these directives, these rules and procedures were to be implemented immediately and for an indefinite period of time.

To comply with these directives, we reinforced security by:

·                  increasing and improving the security training of airport personnel,

·                  increasing the supervision and responsibilities of both our security personnel and airline security personnel that operate in our airports,

·                  issuing new electronic identification cards to airport personnel,

·                  reinforcing control of different access areas of our airports, and

·                  physically changing the access points to several of the restricted areas of our airports.

Airlines have also contributed to the enhanced security at our airports as they have adopted new procedures and rules issued by the General Office of Civil Aviation applicable to airlines.  Some measures adopted by the airlines include adding more points for verification of passenger identification, inspecting luggage prior to check-in and reinforcing controls over access to airplanes by service providers (such as baggage handlers and food service providers).  As of January 1, 2006, we are providing additional services to the airlines, including providing facilities to assist airlines in complying with requirements to screen all checked baggage on international flights.  We began providing similar assistance to domestic flights as of July 1, 2006.

Fuel

All airport property and installations related to the supply of aircraft fuel were retained by the Mexican Airport and Auxiliary Services Agency in connection with the opening of Mexico’s airports to private investment.  Pursuant to our concessions, the Mexican Airport and Auxiliary Services Agency has entered into agreements obligating it to pay each of our subsidiary concession holders a fee for access to our facilities equivalent to 1% of the service charge for fuel supply.  In the event that the Mexican government were to privatize fuel supply activities in the future, the terms of our concessions provide that it will do so through a competitive bidding process.

Construction Services

Under Mexican INIF 17, “Service Concession Contracts,” which we adopted in 2010, an operator of a service concession that is required to make capital improvements to concessioned assets is deemed to provide construction or upgrade services.  Because we are required to make improvements to our airports in accordance with the Master Development Plans, we fall within the scope of INIF17, and as a result, beginning in 2010, we are required to account for the

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revenues relating to those services, which are closely correlated to our capital expenditures in the relevant period.

Our Airports

In 2011, our airports served a total of approximately 17.5 million passengers, approximately 57.5% of which were international passengers.  In 2010, our airports served a total of 16.7 million passengers, approximately 58.8% of which were international passengers.  In 2009, our airports served a total of 15.5 million passengers, approximately 56.6% of which were international passengers.  In 2011, Cancún International Airport accounted for 74.2% of our passenger traffic volume and 72.8% of our revenues from our nine airports.

All of our airports are designated as international airports under Mexican law, which indicates that they are equipped to receive international flights and have customs and immigration facilities.

The following table sets forth the number of passengers served by our airports based on flight origination or destination.

Passengers by Flight Origin or Destination(1)
(in thousands)

Year Ended December 31,