SECURITIES AND EXCHANGE COMMISSION Washington, DC FORM U-6B-2 Certificate of Notification Filed by a registered holding company or subsidiary thereof pursuant to Rule U-20-(d) [Reg. Section 250.20, P. 36,652] or U-47 [Reg. Section 250.47, P. 36,620] adopted under the Public Utility Holding Company Act of 1935. Certificate is filed by: Ameren Corporation (AMC), Ameren Services (AMS), Ameren Energy (AME), CIPSCO Investment Company (CIC), Union Electric Development Corporation (UEDC), Ameren Energy Communications (AEC), Ameren ERC (ERC), Ameren Energy Resources Company (AER), Illinois Material Supply Co. (IMS), Ameren Energy Generating Company (AEG), Ameren Energy Marketing Company (AEM), Ameren Energy Fuels and Services Company (AFS), Ameren Energy Development Company (AED) and Ameren Development Company (ADC). This certificate is notice that the above named companies have issued, renewed or guaranteed the security or securities described herein which issue, renewal or guaranty was exempted from the provisions of Section 6(a) of the Act and was neither the subject of a declaration or application on Form U-1 nor included within the exemption provided by Rule U-48 [Reg. Section 250.48, P. 36,621]. 1. Type of securities ("draft", "promissory note"): Promissory Notes. 2. Issue, renewal or guaranty: Issue. 3. Principal amount of each security: A non-utility money pool allows non-utility subsidiaries of AMC to contribute and/or borrow funds without going to an external provider or creditor. The principal amount is limited only by cash available. Funds are borrowed and/or repaid daily as cash needs dictate. See Attachments A (Contributions to the Non-Utility Money Pool) and B (Loans from Non-Utility Money Pool) for daily outstanding contributions and loans. 4. Rate of interest per annum of each security: Rates varied daily along with money market rates, as defined in the Agreement. (See Attachment C for daily rates.) 5. Date of issue, renewal, or guaranty of each security: Various. (See Attachments A and B.) 6. If renewal of security, give date of original issue: Not applicable. 7. Date of maturity of each security: All loans were made for one day, or in the case of Friday borrowings, until the next work day, and repaid or rolled over the next business days, as need dictated. (See attached Attachments A and B.) 8. Name of the person to whom each security was issued, renewed or guaranteed: Not applicable. 9. Collateral given with each security: None. 10. Consideration given for each security: None, other than interest accrued. 11. Application of proceeds of each security: a) Loaned as needed to AME. (See Attachment B) b) Loaned as needed to AEC. (See Attachment B) c) Loaned as needed to ERC. (See Attachment B) d) Loaned as needed to AER. (See Attachment B) e) Loaned as needed to AEG. (See Attachment B) f) Loaned as needed to IMS. (See Attachment B) g) Loaned as needed to AED. (See Attachment B) h) Loaned as needed to AEM. (See Attachment B) i) Loaned as needed to AFS. (See Attachment B) j) Loaned as needed to ADC. (See Attachment B) 12. Indicate by a check after the applicable statement below whether the issue, renewal or guaranty of each security was exempt from the provisions of Section 6(a) because of: a) the provisions contained in the first sentence of Section 6(b): Not applicable. b) the provisions contained in the fourth sentence of Section 6(b): Not applicable. c) the provisions contained in any rule of the Commission other than Rule U-48: [X]. 13. If the security or securities were exempt from the provisions of Section 6(a) by virtue of the first sentence of Section 6(b), give the figures which indicate that the security or securities aggregate (together with all other than outstanding notes and drafts of a maturity of nine months or less, exclusive of days of grace, as to which such company is primarily or secondarily liable) not more than 5 percentum of the principal amount and par value of the other securities of such company then outstanding. (Demand notes, regardless of how long they may have been outstanding, shall be considered as maturing in not more than nine months for purposes of the exemption from Section 6(a) of the Act granted by the first sentence of Section 6(b)): Not applicable. 14. If the security or securities are exempt from the provisions of Section 6(a) because of the fourth sentence of Section 6(b), name the security outstanding on January 1, 1935, pursuant to the terms of which the security or securities herein described have been issued. Not applicable. 15. If the security or securities are exempt from the provisions of Section 6(a) because of any rule of the Commission other than Rule U-48 [Reg. ss. 250.48, P. 36,621] designate the rule under which exemption is claimed. Rule 52. /s/ Jerre E. Birdsong -------------------------------- Jerre E. Birdsong Vice President and Treasurer Ameren Corporation Dated: May 30, 2002 Attachment A Contributions to the Non-Utility Money Pool Outstanding Amounts (Thousands of Dollars) Date AMC AEM CIC UEDC Total Beg Bal 397,220 12,900 700 2,550 413,370 01/01/2002 397,220 12,900 700 2,550 413,370 01/02/2002 395,120 12,900 700 2,550 411,270 01/03/2002 395,420 12,900 700 2,550 411,570 01/04/2002 398,920 12,900 700 2,550 415,070 01/05/2002 398,920 12,900 700 2,550 415,070 01/06/2002 398,920 12,900 700 2,550 415,070 01/07/2002 400,320 12,900 700 2,550 416,470 01/08/2002 401,120 12,900 700 2,250 416,970 01/09/2002 401,520 12,900 700 2,250 417,370 01/10/2002 406,570 12,900 700 2,250 422,420 01/11/2002 410,070 12,800 700 2,250 425,820 01/12/2002 410,070 12,800 700 2,250 425,820 01/13/2002 410,070 12,800 700 2,250 425,820 01/14/2002 410,970 12,800 700 2,250 426,720 01/15/2002 416,870 12,000 700 2,250 431,820 01/16/2002 416,970 12,000 700 2,250 431,920 01/17/2002 416,070 13,300 700 2,250 432,320 01/18/2002 420,520 13,700 250 2,250 436,720 01/19/2002 420,520 13,700 250 2,250 436,720 01/20/2002 420,520 13,700 250 2,250 436,720 01/21/2002 420,520 13,700 250 2,250 436,720 01/22/2002 423,420 14,600 250 2,250 440,520 01/23/2002 428,720 15,000 250 1,250 445,220 01/24/2002 433,020 18,500 1,050 1,250 453,820 01/25/2002 442,370 18,500 1,050 1,250 463,170 01/26/2002 442,370 18,500 1,050 1,250 463,170 01/27/2002 442,370 18,500 1,050 1,250 463,170 01/28/2002 455,420 23,150 1,050 1,250 480,870 01/29/2002 457,020 23,050 1,050 1,250 482,370 01/30/2002 467,270 22,100 1,050 1,250 491,670 01/31/2002 442,570 8,900 1,050 1,250 453,770 02/01/2002 444,470 8,900 1,050 1,250 455,670 02/02/2002 444,470 8,900 1,050 1,250 455,670 02/03/2002 444,470 8,900 1,050 1,250 455,670 02/04/2002 446,670 8,900 1,050 1,250 457,870 02/05/2002 415,570 0 1,050 1,250 417,870 02/06/2002 416,970 0 1,050 1,250 419,270 02/07/2002 418,070 0 1,050 1,250 420,370 02/08/2002 421,870 0 1,050 1,250 424,170 02/09/2002 421,870 0 1,050 1,250 424,170 02/10/2002 421,870 0 1,050 1,250 424,170 02/11/2002 429,470 0 1,050 1,250 431,770 02/12/2002 442,220 0 1,050 1,250 444,520 02/13/2002 451,370 0 1,050 1,250 453,670 02/14/2002 453,570 0 1,050 1,250 455,870 02/15/2002 446,270 0 1,050 1,250 448,570 02/16/2002 446,270 0 1,050 1,250 448,570 02/17/2002 446,270 0 1,050 1,250 448,570 02/18/2002 446,270 0 1,050 1,250 448,570 02/19/2002 447,370 0 1,050 1,250 449,670 02/20/2002 446,870 0 1,050 1,250 449,170 02/21/2002 445,420 0 1,050 1,250 447,720 02/22/2002 456,920 0 1,050 1,250 459,220 02/23/2002 456,920 0 1,050 1,250 459,220 02/24/2002 456,920 0 1,050 1,250 459,220 02/25/2002 464,120 0 1,050 1,250 466,420 02/26/2002 436,720 0 1,050 1,250 439,020 02/27/2002 432,720 0 1,050 1,250 435,020 02/28/2002 434,920 0 1,050 1,250 437,220 03/01/2002 436,120 0 1,050 1,250 438,420 03/02/2002 436,120 0 1,050 1,250 438,420 03/03/2002 436,120 0 1,050 1,250 438,420 03/04/2002 437,920 0 1,050 1,250 440,220 03/05/2002 439,020 0 1,050 1,250 441,320 03/06/2002 439,170 0 1,050 1,250 441,470 03/07/2002 437,420 0 1,050 1,250 439,720 03/08/2002 435,170 0 1,050 1,250 437,470 03/09/2002 435,170 0 1,050 1,250 437,470 03/10/2002 435,170 0 1,050 1,250 437,470 03/11/2002 436,620 0 1,050 1,250 438,920 03/12/2002 437,470 0 1,050 1,250 439,770 03/13/2002 441,970 0 1,050 1,250 444,270 03/14/2002 445,170 0 1,050 1,250 447,470 03/15/2002 448,670 0 1,050 1,250 450,970 03/16/2002 448,670 0 1,050 1,250 450,970 03/17/2002 448,670 0 1,050 1,250 450,970 03/18/2002 456,870 0 2,050 1,250 460,170 03/19/2002 458,270 0 2,050 1,250 461,570 03/20/2002 458,370 0 2,050 1,150 461,570 03/21/2002 455,670 0 2,050 1,150 458,870 03/22/2002 464,490 0 2,050 1,150 467,690 03/23/2002 464,490 0 2,050 1,150 467,690 03/24/2002 464,490 0 2,050 1,150 467,690 03/25/2002 469,940 0 2,050 1,150 473,140 03/26/2002 466,240 1,950 2,050 1,150 471,390 03/27/2002 439,290 0 2,050 1,150 442,490 03/28/2002 447,690 0 950 1,150 449,790 03/29/2002 447,690 0 950 1,150 449,790 03/30/2002 447,690 0 950 1,150 449,790 03/31/2002 447,690 0 950 1,150 449,790 Attachment B Loans From Non-Utility Money Pool (Thousands of Dollars) Date AME AEG ERC IMS AEC AED AEM AER AFS ADC TOTAL Beg Bal 4970 61700 15690 17060 23050 277175 0 5350 7325 1050 413370 01/01/2002 4970 61700 15690 17060 23050 277175 0 5350 7325 1050 413370 01/02/2002 4970 63300 12390 17060 23050 277275 0 5350 6825 1050 411270 01/03/2002 4970 63600 12390 17060 23050 277275 0 5350 6825 1050 411570 01/04/2002 4970 64300 12390 17060 23050 280275 0 5350 6625 1050 415070 01/05/2002 4970 64300 12390 17060 23050 280275 0 5350 6625 1050 415070 01/06/2002 4970 64300 12390 17060 23050 280275 0 5350 6625 1050 415070 01/07/2002 5070 65000 12390 17060 23050 280875 0 5350 6625 1050 416470 01/08/2002 5070 65200 12390 17060 23050 281175 0 5350 6625 1050 416970 01/09/2002 5270 66600 12390 17060 23050 281175 0 5350 5425 1050 417370 01/10/2002 5270 70800 12390 17060 23050 281175 0 5350 6275 1050 422420 01/11/2002 5270 72300 12390 17960 23050 282175 0 5350 6275 1050 425820 01/12/2002 5270 72300 12390 17960 23050 282175 0 5350 6275 1050 425820 01/13/2002 5270 72300 12390 17960 23050 282175 0 5350 6275 1050 425820 01/14/2002 5270 73600 11890 18060 23050 282175 0 5350 6275 1050 426720 01/15/2002 8370 74700 11890 18860 23050 282275 0 5350 6275 1050 431820 01/16/2002 8370 75400 11890 18860 23050 282275 0 5350 5675 1050 431920 01/17/2002 8370 76100 11890 18560 23050 282475 0 5350 5475 1050 432320 01/18/2002 11970 76500 11890 18560 23250 283375 0 5350 4775 1050 436720 01/19/2002 11970 76500 11890 18560 23250 283375 0 5350 4775 1050 436720 01/20/2002 11970 76500 11890 18560 23250 283375 0 5350 4775 1050 436720 01/21/2002 11970 76500 11890 18560 23250 283375 0 5350 4775 1050 436720 01/22/2002 11970 77700 11890 18560 23250 283375 0 5350 7375 1050 440520 01/23/2002 11970 79900 11890 20960 23250 283375 0 5350 7475 1050 445220 01/24/2002 11970 82700 11890 20960 23250 283375 0 5350 13275 1050 453820 01/25/2002 11970 87400 11890 20960 23250 283425 0 5350 17875 1050 463170 01/26/2002 11970 87400 11890 20960 23250 283425 0 5350 17875 1050 463170 01/27/2002 11970 87400 11890 20960 23250 283425 0 5350 17875 1050 463170 01/28/2002 11970 101300 11890 20960 23250 283425 0 5350 21175 1550 480870 01/29/2002 11970 102600 11890 21160 23250 283425 0 5350 21175 1550 482370 01/30/2002 16070 106000 11890 21260 23250 284025 0 5350 22275 1550 491670 01/31/2002 16170 68600 11890 21260 23250 284625 0 5350 21075 1550 453770 02/01/2002 16270 70600 11890 21260 23250 284725 0 5350 20775 1550 455670 02/02/2002 16270 70600 11890 21260 23250 284725 0 5350 20775 1550 455670 02/03/2002 16270 70600 11890 21260 23250 284725 0 5350 20775 1550 455670 02/04/2002 16270 73300 11890 21260 23250 284825 0 5350 20175 1550 457870 02/05/2002 6570 171600 12490 21260 23250 145225 8200 8650 19075 1550 417870 02/06/2002 6570 172950 12490 21310 23250 145225 8200 8650 19075 1550 419270 02/07/2002 6570 174350 12490 20810 23250 145425 8200 8650 19075 1550 420370 02/08/2002 6570 178150 12490 20810 23250 145425 8200 8650 19075 1550 424170 02/09/2002 6570 178150 12490 20810 23250 145425 8200 8650 19075 1550 424170 02/10/2002 6570 178150 12490 20810 23250 145425 8200 8650 19075 1550 424170 02/11/2002 6570 182250 12490 20810 23250 147825 8200 8650 20175 1550 431770 02/12/2002 6570 185450 12490 20910 23250 148475 8200 8650 28975 1550 444520 02/13/2002 10570 189050 12490 21110 23400 149075 8800 8650 28975 1550 453670 02/14/2002 10570 190050 12490 22310 23400 149075 8800 8650 28975 1550 455870 02/15/2002 10870 194650 11890 22310 23400 149075 8800 8650 17375 1550 448570 02/16/2002 10870 194650 11890 22310 23400 149075 8800 8650 17375 1550 448570 02/17/2002 10870 194650 11890 22310 23400 149075 8800 8650 17375 1550 448570 02/18/2002 10870 194650 11890 22310 23400 149075 8800 8650 17375 1550 448570 02/19/2002 10870 195900 11890 22310 23400 149075 8950 8650 17075 1550 449670 02/20/2002 10870 199000 11890 22310 23400 149075 5200 8650 17225 1550 449170 02/21/2002 10870 199500 11890 22310 23400 149075 3250 8650 17225 1550 447720 02/22/2002 10070 202000 11890 22310 23400 152875 1450 8650 25025 1550 459220 02/23/2002 10070 202000 11890 22310 23400 152875 1450 8650 25025 1550 459220 02/24/2002 10070 202000 11890 22310 23400 152875 1450 8650 25025 1550 459220 02/25/2002 10070 206200 11890 22310 23400 152875 850 8650 28625 1550 466420 02/26/2002 7470 164700 12390 22310 23500 152175 17150 8650 29125 1550 439020 02/27/2002 7470 165000 12390 22410 23500 152175 13250 8650 28625 1550 435020 02/28/2002 7770 167100 12390 22510 23500 152175 13350 8650 28225 1550 437220 03/01/2002 7770 169200 12390 22610 23500 152175 13350 8650 27225 1550 438420 03/02/2002 7770 169200 12390 22610 23500 152175 13350 8650 27225 1550 438420 03/03/2002 7770 169200 12390 22610 23500 152175 13350 8650 27225 1550 438420 03/04/2002 8170 170400 12390 22610 23500 152375 13350 8650 27225 1550 440220 03/05/2002 8170 171400 12390 22610 23500 152475 13350 8650 27225 1550 441320 03/06/2002 8170 171800 12390 22360 23500 152475 13350 8650 27225 1550 441470 03/07/2002 8170 172300 12390 23560 23500 152575 9550 8650 27475 1550 439720 03/08/2002 8170 174000 10890 23710 23500 152575 9550 8650 24875 1550 437470 03/09/2002 8170 174000 10890 23710 23500 152575 9550 8650 24875 1550 437470 03/10/2002 8170 174000 10890 23710 23500 152575 9550 8650 24875 1550 437470 03/11/2002 8170 175100 10890 23760 23500 152575 9850 8650 24875 1550 438920 03/12/2002 8170 180400 10890 24110 23500 152675 9850 8650 19975 1550 439770 03/13/2002 11970 181300 10890 24110 23650 153275 10050 8750 18725 1550 444270 03/14/2002 11970 182000 10890 23810 23650 155875 10050 8750 18925 1550 447470 03/15/2002 12970 183450 10890 23810 23650 155875 10600 8750 19425 1550 450970 03/16/2002 12970 183450 10890 23810 23650 155875 10600 8750 19425 1550 450970 03/17/2002 12970 183450 10890 23810 23650 155875 10600 8750 19425 1550 450970 03/18/2002 12970 192650 10890 23810 23650 155875 10600 8750 19425 1550 460170 03/19/2002 12970 193650 10890 24010 23650 155975 10600 8750 19525 1550 461570 03/20/2002 12970 195650 10890 24010 23650 155975 9000 8750 19125 1550 461570 03/21/2002 12970 195850 10890 24010 23650 155975 6350 8750 18875 1550 458870 03/22/2002 12970 200420 10890 23710 23650 156225 3250 8750 26275 1550 467690 03/23/2002 12970 200420 10890 23710 23650 156225 3250 8750 26275 1550 467690 03/24/2002 12970 200420 10890 23710 23650 156225 3250 8750 26275 1550 467690 03/25/2002 13070 203970 10890 24010 23650 156225 2500 8750 28525 1550 473140 03/26/2002 13070 204720 10890 24010 23650 156225 0 8750 28525 1550 471390 03/27/2002 8770 166920 11490 22660 23650 158525 14700 8900 25325 1550 442490 03/28/2002 9070 170920 11490 18660 23650 164525 14800 8900 26225 1550 449790 03/29/2002 9070 170920 11490 18660 23650 164525 14800 8900 26225 1550 449790 03/30/2002 9070 170920 11490 18660 23650 164525 14800 8900 26225 1550 449790 03/31/2002 9070 170920 11490 18660 23650 164525 14800 8900 26225 1550 449790 Attachment C Calculates net interest on contributors and borrowers 01/01/2002 1.8690% 01/02/2002 1.8662% 01/03/2002 1.8649% 01/04/2002 1.8619% 01/05/2002 1.8619% 01/06/2002 1.8619% 01/07/2002 1.8616% 01/08/2002 1.8566% 01/09/2002 1.8756% 01/10/2002 1.8744% 01/11/2002 1.8628% 01/12/2002 1.8628% 01/13/2002 1.8628% 01/14/2002 1.8363% 01/15/2002 1.8297% 01/16/2002 1.8171% 01/17/2002 1.7984% 01/18/2002 1.7974% 01/19/2002 2.7344% 01/20/2002 1.7974% 01/21/2002 1.7974% 01/22/2002 1.8078% 01/23/2002 1.8144% 01/24/2002 2.7344% 01/25/2002 2.7010% 01/26/2002 2.7010% 01/27/2002 2.7010% 01/28/2002 2.6841% 01/29/2002 2.6747% 01/30/2002 2.6490% 01/31/2002 2.7007% 02/01/2002 2.6957% 02/02/2002 2.6957% 02/03/2002 2.6957% 02/04/2002 2.6847% 02/05/2002 2.7487% 02/06/2002 2.7424% 02/07/2002 2.7460% 02/08/2002 2.7129% 02/09/2002 2.7129% 02/10/2002 2.7129% 02/11/2002 2.6992% 02/12/2002 2.6813% 02/13/2002 2.6613% 02/14/2002 2.6828% 02/15/2002 2.7144% 02/16/2002 2.7144% 02/17/2002 2.7144% 02/18/2002 2.7144% 02/19/2002 2.6636% 02/20/2002 2.6888% 02/21/2002 2.6904% 02/22/2002 2.6636% 02/23/2002 2.6636% 02/24/2002 2.6636% 02/25/2002 2.6504% 02/26/2002 2.7321% 02/27/2002 2.7439% 02/28/2002 2.7714% 03/01/2002 2.7424% 03/02/2002 2.7424% 03/03/2002 2.7424% 03/04/2002 8.2623% 03/05/2002 8.3318% 03/06/2002 8.4283% 03/07/2002 8.5963% 03/08/2002 8.5370% 03/09/2002 8.5370% 03/10/2002 8.5370% 03/11/2002 8.5713% 03/12/2002 8.5296% 03/13/2002 8.6733% 03/14/2002 8.7974% 03/15/2002 8.5428% 03/16/2002 8.5428% 03/17/2002 8.5428% 03/18/2002 8.4550% 03/19/2002 8.8399% 03/20/2002 8.8399% 03/21/2002 8.8399% 03/22/2002 8.8399% 03/23/2002 8.8399% 03/24/2002 8.8399% 03/25/2002 8.8399% 03/26/2002 8.8399% 03/27/2002 8.8399% 03/28/2002 7.9161% 03/29/2002 7.9161% 03/30/2002 7.9161% 03/31/2002 7.9161%