UNITED STATES OF AMERICA
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                 )
The AES Corporation              )                          File No. 70-9465
                                 )


            Certificate Pursuant to Rule 24 and Release No. 35-27063
              Under the Public Utility Holding Company Act of 1935


                  On August 20, 1999, the Securities and Exchange Commission
("SEC") issued an order, Release No. 35-27063 in File No. 70-9465 ("Exemption
Order"), granting an exemption under Section 3(a) of the Public Utility Holding
Company Act of 1935, as amended, to The AES Corporation ("AES") in relation to
its proposed acquisition of CILCORP Inc. ("CILCORP"), which has a public-utility
subsidiary company, Central Illinois Light Company ("CILCO"). The Exemption
Order required AES to file certain certificates (as described in the Exemption
Order) under Rule 24 within 60 days of the close of each calendar quarter for a
period of three years beginning September 30, 1999 and every six months
thereafter. A certificate complying with the Exemption Order is set forth below
(as an attachment) for the period ending September 30, 2001. AES is separately
filing a certificate in File No. 70-9779 as required by the Commission's order
in Release No. 35-27363 in connection with the AES acquisition of IPALCO
Enterprises, Inc. ("IPALCO"), which has a public-utility subsidiary company,
Indianapolis Power & Light Company ("IPL").

                                        Respectfully submitted,

                                        /s/ Earle H. O'Donnell
                                        -------------------------------
                                        Earle H. O'Donnell
                                        Andrew B. Young
                                        Hugh E. Hilliard

                                        Dewey Ballantine LLP
                                        1775 Pennsylvania Avenue, N.W.
                                        Washington, D.C.  20006

Dated:  November 29, 2001





                               THE AES CORPORATION
             SEC FILING PURSUANT TO SECTION 3(a)(5) EXEMPTION ORDER
                        QUARTER ENDED SEPTEMBER 30, 2001


ITEM (1) PER EXEMPTION ORDER (STATEMENTS ATTACHED):

1)       Statement of Income of The AES Corporation for the 12 months ended
         September 30, 2001:
         a)       12 months ended September 30, 2001 GAAP consolidated income
                  statement
         b)       12 months ended September 30, 2001 pro rata consolidated
                  income statement

2)       Balance Sheet of The AES Corporation at September 30, 2001
         a)       GAAP Basis Consolidated Balance Sheet
         b)       Pro Rata Consolidated Balance Sheet

3)       Statement of Income of CILCORP for the 12 months ended September 30,
         2001

4)       Statement of Income of CILCO for the 12 months ended September 30, 2001

5)       Consolidated Balance Sheet of CILCORP at September 30, 2001

6)       Consolidated Balance Sheet of CILCO at September 30, 2001


                                        2



THE AES CORPORATION
-------------------
                      CONSOLIDATED STATEMENT OF OPERATIONS
                          (INCLUDES CILCORP AND IPALCO)
           FOR THE TWELVE MONTHS ENDED SEPTEMBER 30, 2001 - GAAP BASIS
                                   (UNAUDITED)


----------------------------------------------------------------------------------------------------------
                                                                                                TWELVE
                                                                                                MONTHS
                                                                                                 ENDED
                                                                                               9/30/2001
----------------------------------------------------------------------------------------------------------
                                                                                           
($ in millions, except per share amounts)

REVENUES:
Sales and services                                                                             $    9,168

OPERATING COSTS AND EXPENSES:
Cost of sales and services                                                                          6,999
Selling, general and administrative expenses                                                          103
                                                                            ------------------------------
TOTAL OPERATING COSTS AND EXPENSES                                                                  7,102
                                                                            ------------------------------

OPERATING INCOME                                                                                    2,066

OTHER INCOME AND (EXPENSE):
Interest expense, net                                                                              (1,569)
Equity in earnings of affiliates
 (before income tax)                                                                                  282
Other income (expense)                                                                                254
Nonrecurring severance and transaction costs                                                         (215)
Loss on sale of Power Direct                                                                          (31)
                                                                            ------------------------------

INCOME BEFORE INCOME TAXES, MINORITY INTEREST AND EXTRAORDINARY ITEM                                  787

Income tax provision                                                                                  218
Minority interest                                                                                     119
                                                                            ------------------------------

INCOME BEFORE EXTRAORDINARY ITEM                                                                      450

Extraordinary Item                                                                                      4
                                                                            ------------------------------

NET INCOME                                                                                      $     446
                                                                            ==============================



                                       3



THE AES CORPORATION
-------------------

                      CONSOLIDATED STATEMENT OF OPERATIONS
                          (INCLUDES CILCORP AND IPALCO)
         FOR THE TWELVE MONTHS ENDED SEPTEMBER 30, 2001 - PRO RATA BASIS



-------------------------------------------------------------------------------------------------------------
                                                                                                   TWELVE
                                                                                                   MONTHS
                                                                                                    ENDED
                                                                                                  9/30/2001
-------------------------------------------------------------------------------------------------------------
                                                                                              
($ in millions, except per share amounts)

REVENUES:
Sales and services                                                                                $   10,261

OPERATING COSTS AND EXPENSES:
Cost of sales and services                                                                             7,725
Selling, general and administrative expenses                                                             107
                                                                     ----------------------------------------

TOTAL OPERATING COSTS AND EXPENSES                                                                     7,832
                                                                     ----------------------------------------
OPERATING INCOME                                                                                       2,429

OTHER INCOME AND (EXPENSE):
Interest expense, net                                                                                 (1,401)
Other income (expense)                                                                                  (212)
Nonrecurring severance and transaction costs                                                            (215)
Loss on sale of Power Direct                                                                             (31)
                                                                     ----------------------------------------

INCOME BEFORE INCOME TAXES, MINORITY INTEREST AND EXTRAORDINARY ITEM                                     570


Income tax provision                                                                                     120
                                                                     ----------------------------------------

INCOME BEFORE EXTRAORDINARY ITEM                                                                         450

Extraordinary item                                                                                         4
                                                                     ----------------------------------------

NET INCOME                                                                                         $     446
                                                                     ========================================




                                       4



THE AES CORPORATION
-------------------

                             GAAP BASIS CONSOLIDATED BALANCE SHEET
                                 (INCLUDES CILCORP AND IPALCO)

SEPTEMBER 30, 2001
(UNAUDITED)
($ in millions)
ASSETS


                                                                                  
CURRENT ASSETS
     Cash and cash equivalents                                                        $    1,297
     Short-term investments                                                                  294
     Accounts receivable, net                                                              1,586
     Inventory                                                                               589
     Receivable from affiliates                                                               17
     Prepaid expenses and other current assets                                               572
                                                                             -------------------
     TOTAL CURRENT ASSETS                                                                  4,355

PROPERTY, PLANT AND EQUIPMENT
     Land                                                                                    609
     Electric generation and distribution assets                                          20,661
     Accumulated depreciation and amortization                                            (3,125)
     Construction in progress                                                              4,747
                                                                             -------------------
     PROPERTY, PLANT AND EQUIPMENT, NET                                                   22,892


OTHER ASSETS
     Deferred financing costs, net                                                           447
     Project development costs                                                                80
     Investments in and advances to affiliates                                             3,005
     Debt service reserves and other deposits                                                408
     Excess of cost net assets acquired, net                                               2,834
     Other assets                                                                          2,360
                                                                             -------------------
     TOTAL OTHER ASSETS                                                                    9,134

     TOTAL                                                                           $    36,381
                                                                             ===================



                                       5




                                                                                  
LIABILITIES & STOCKHOLDERS' EQUITY

CURRENT LIABILITIES
     Accounts payable                                                                  $     771
     Accrued interest                                                                        505
     Accrued and other liabilities                                                         1,624
     Non-recourse debt - current portion                                                   2,466
                                                                             -------------------
     TOTAL CURRENT LIABILITIES                                                             5,366

LONG-TERM LIABILITIES
     Non-recourse debt                                                                    14,291
     Recourse debt                                                                         5,396
     Deferred incomes taxes                                                                2,105
     Other long-term liabilities                                                           1,757
                                                                             -------------------
     TOTAL LONG-TERM LIABILITIES                                                          23,549

     Minority interest                                                                     1,110

     Company-obligated Convertible Mandatorily
     Redeemable Preferred Securities of Subsidiary
     Trusts Holding Solely Junior Debentures of AES                                        1,228


STOCKHOLDERS' EQUITY
     Common Stock                                                                              5
     Additional paid-in Capital                                                            5,207
     Retained earnings                                                                     2,757
     Accumulated other comprehensive loss                                                 (2,841)
                                                                             -------------------
     TOTAL STOCKHOLDERS' EQUITY                                                            5,128

     TOTAL                                                                           $    36,381
                                                                             ===================



                                       6



THE AES CORPORATION
-------------------

                               PRO RATA CONSOLIDATED BALANCE SHEET
                                  (INCLUDES CILCORP AND IPALCO)
SEPTEMBER 30, 2001
($ in millions)

ASSETS


                                                                              
CURRENT ASSETS
    Cash and cash equivalents                                                        $      1,372
    Short-term investments                                                                    246
    Accounts receivable, net                                                                1,745
    Inventory                                                                                 565
    Receivable from affiliates                                                                 12
    Deferred income taxes                                                                      62
    Prepaid expenses and other current assets                                                 670
                                                                              -------------------
    TOTAL CURRENT ASSETS                                                                    4,672

PROPERTY, PLANT AND EQUIPMENT
    Land                                                                                      715
    Electric generation and distribution assets                                            22,029
    Accumulated depreciation and amortization                                              (3,458)
    Construction in progress                                                                4,672
                                                                              -------------------
    PROPERTY, PLANT AND EQUIPMENT, NET                                                     23,958

OTHER ASSETS
    Deferred financing costs, net                                                             424
    Project development costs                                                                  84
    Investments in and advances to affiliates                                               3,336
    Debt service reserves and other deposits                                                  688
    Excess of Cost over Net Assets Acquired                                                 2,566
    Other assets                                                                            2,407
                                                                              -------------------
    TOTAL OTHER ASSETS                                                                      9,505

    TOTAL                                                                           $      38,135
                                                                              ===================



                                       7




                                                                              
LIABILITIES & STOCKHOLDERS' EQUITY

CURRENT LIABILITIES
    Accounts payable                                                                  $       865
    Accrued interest                                                                          549
    Accrued and other liabilities                                                           1,644
    Other notes payable - current portion                                                     814
    Project financing debt - current portion                                                1,798
                                                                              -------------------
    TOTAL CURRENT LIABILITIES                                                               5,670

LONG-TERM LIABILITIES
    Recourse Debt-LT                                                                        5,396
    Project Financing Debt-LT                                                              14,568
    Other notes payable-LT                                                                    158
    Deferred Tax Liability                                                                  2,092
    Other long-term liabilities                                                             2,364
                                                                              -------------------
    TOTAL LONG-TERM LIABILITIES                                                            24,578

    TECONS                                                                                  1,228

STOCKHOLDERS' EQUITY
    Common Stock                                                                                5
    Contributed capital / Additional paid in capital                                        5,845
    Retained earnings                                                                       3,650
    Accumulated other comprehensive loss                                                   (2,841)
                                                                              -------------------
    TOTAL STOCKHOLDERS' EQUITY                                                              6,659

    TOTAL                                                                           $      38,135
                                                                              ===================



                                       8



                              CILCORP CONSOLIDATED
                                INCOME STATEMENT
                          TWELVE MONTHS ENDED 9/30/2001
                                   (UNAUDITED)


                                                                               

REVENUE:
CILCO ELECTRIC                                                                                   $ 394,181
CILCO GAS                                                                                          330,995
CILCO OTHER                                                                                         87,791
OTHER BUSINESSES                                                                                    59,262
                                                                       ------------------------------------
        TOTAL                                                                                      872,229
                                                                       ------------------------------------

OPERATING EXPENSES:
FUEL FOR GENERATION AND PURCHASED POWER                                                            228,381
GAS PURCHASED FOR RESALE                                                                           284,484
OTHER OPERATIONS AND MAINTENANCE                                                                   124,562
DEPRECIATION AND AMORTIZATION                                                                       87,412
TAXES, OTHER THAN INCOME TAXES                                                                      40,120
                                                                       ------------------------------------
        TOTAL                                                                                      764,959
                                                                       ------------------------------------

FIXED CHARGES AND OTHER:
INTEREST EXPENSE                                                                                    71,969
PREFERRED STOCK DIVIDENDS OF SUBSIDIARY                                                              2,159
ALLOWANCE FOR FUNDS USED DURING CONSTRUCTION                                                          (253)
OTHER                                                                                                1,404
                                                                       ------------------------------------
        TOTAL                                                                                       75,279
                                                                       ------------------------------------

INCOME FROM CONTINUING OPERATIONS BEFORE
  INCOME TAXES                                                                                      31,991
INCOME TAXES                                                                                        15,634

NET INCOME (LOSS) FROM CONTINUING OPERATIONS                                                        16,357

INCOME (LOSS) FROM OPERATIONS OF DISCONTINUED
  BUSINESS, NET OF TAXES                                                                            (4,278)
EXTRAORDINARY ITEM                                                                                       -
  NET INCOME (LOSS) BEFORE MINORITY INTEREST                                                        12,079

MINORITY INTEREST                                                                                        -

                                                                       ------------------------------------
  NET INCOME (LOSS)                                                                                 12,079

OTHER COMPREHENSIVE INCOME                                                                         (13,147)

                                                                       ------------------------------------
COMPREHENSIVE INCOME (LOSS)                                                                     $   (1,068)
                                                                       ====================================



                                       9



CENTRAL ILLINOIS LIGHT COMPANY
CONSOLIDATED STATEMENT OF INCOME
(unaudited)




                                                                    Twelve Months Ended
                                                                         9/30/2001
                                                                 
Operating Revenues:
Electric                                                                    $  394,181
Gas                                                                            330,995
                                                                    -------------------
                                                                               725,176
                                                                    -------------------

Operating Expenses:
Cost of Fuel                                                                   139,771
Cost of Gas                                                                    242,912
Purchased Power                                                                 40,506
Other Operation & Maintenance Expenses                                         119,667
Depreciation and Amortization                                                   68,184
Income Taxes                                                                    19,791
Other Taxes                                                                     40,016
                                                                    -------------------
       Total Operating Expenses                                                670,847
                                                                    -------------------

Operating Income                                                                54,329

Other Income and Deductions
CILCO Owned Life Insurance                                                      (1,404)
Other, Net                                                                       7,888
                                                                    -------------------
      Total other income and (deductions)                                        6,484
                                                                    -------------------

Income Before Interest Expenses                                                 60,813

Interest Expenses:
Interest on Long-Term Debt                                                      17,627
Cost of Borrowed Funds Capitalized                                                (253)
Other                                                                            6,915
                                                                    -------------------
      Total interest expense                                                    24,289
                                                                    -------------------

Net (loss) Income Before Preferred Dividends                                    36,524
                                                                    -------------------

Preferred Stock Dividends                                                        2,159
                                                                    -------------------

Net Inc Available for Common Stock                                          $   34,365
                                                                    ===================



                                       10



                          CILCORP INC. AND SUBSIDIARIES
                           Consolidated Balance Sheets
                                 (In thousands)
                                   (Unaudited)




                                                                        September 30,  2001
                                                                     
ASSETS

Current assets:
Cash and temporary cash investments                                         $   11,223
Receivables, less reserves of
  $1,221 and $1,343                                                             70,420
Accrued unbilled revenue                                                        19,846
Fuel, at average cost                                                           14,933
Materials and supplies,
   at average cost                                                              18,632
Gas in underground storage,
   at average cost                                                              31,405
FAC/PGA underrecoveries                                                          2,284
Prepayments and other                                                            5,936
                                                                            ----------
       Total current assets                                                    174,679
                                                                            ----------
Investments and other property:
Investment in leveraged leases                                                 135,889
Other investments                                                               19,649
                                                                            ----------
   Total investments and other
     property                                                                  155,538
                                                                            ----------
Property, plant and equipment:
Utility plant, at original cost
   Electric                                                                    712,100
   Gas                                                                         225,299
                                                                            ----------
                                                                               937,399
Less - accumulated provision for
  depreciation                                                                 113,881
                                                                            ----------
                                                                               823,518
Construction work in progress                                                   40,142
Other, net of depreciation                                                          47
                                                                            ----------
       Total property, plant and
         equipment                                                             863,707
                                                                            ----------
Other assets:
Goodwill, net of accumulated
   amortization of $29,920 and $18,422                                         583,044
Other                                                                           80,930
                                                                            ----------
 Total other assets                                                            663,974
                                                                            ----------
       Total assets                                                         $1,857,898
                                                                            ==========



                                       11



                          CILCORP INC. AND SUBSIDIARIES
                           Consolidated Balance Sheets
                                 (In thousands)
                                   (Unaudited)



                                                                        September 30, 2001
                                                                    
LIABILITIES AND STOCKHOLDER'S EQUITY

Current liabilities:
Current portion of long-term debt                                           $   11,800
Notes payable                                                                   89,000
Accounts payable                                                                72,256
Accrued taxes                                                                   13,275
Accrued interest                                                                24,785
FAC/PGA overrecoveries                                                             311
Other                                                                           27,112
                                                                            ----------
        Total current liabilities                                              238,539
                                                                            ----------
Long-term debt                                                                 717,718
                                                                            ----------
Deferred credits and other liabilities:
Deferred income taxes                                                          195,369
Regulatory liability of regulated
  subsidiary                                                                    57,985
Deferred investment tax credits                                                 14,955
Provision for out-of-market contract                                            62,000
Other                                                                           79,938
                                                                            ----------
        Total deferred credits and
          other liabilities                                                     410,247
                                                                            ----------
Preferred stock of subsidiary without
  mandatory redemption                                                          19,120
Preferred stock of subsidiary with
  mandatory redemption                                                          22,000
                                                                            ----------
        Total preferred stock of subsidiary                                     41,120
                                                                            ----------
Stockholder's equity:
Common stock, no par value;
  authorized 10,000 shares -
  outstanding 1,000 shares                                                          --
Additional paid-in capital                                                     468,833
Retained earnings (deficit)                                                     (5,412)
Accumulated other comprehensive income (loss)                                  (13,147)
                                                                            ----------
        Total stockholder's equity                                             450,274
                                                                            ----------
        Total liabilities and
          stockholder's equity                                              $1,857,898
                                                                            ==========



                                       12



                         CENTRAL ILLINOIS LIGHT COMPANY
                           Consolidated Balance Sheets
                                 (In thousands)
                                   (Unaudited)



                                                                      September 30, 2001
                                                                  
ASSETS

Utility plant, at original cost:
  Electric                                                                 $1,321,995
  Gas                                                                         448,666
                                                                           ----------
                                                                            1,770,661
  Less - accumulated provision
    for depreciation                                                          972,780
                                                                           ----------
                                                                              797,881
Construction work in progress                                                  40,142
                                                                           ----------
     Total utility plant                                                      838,023
                                                                           ----------
Other property and investments:
Cash surrender value of company-owned
  life insurance (net of related
  policy loans of $65,207 and $59,292)                                          3,128
Other                                                                           1,133
                                                                           ----------
     Total other property and
       investments                                                              4,261
                                                                           ----------
Current assets:
Cash and temporary cash investments                                             8,091
Receivables, less reserves of
  $1,221 and $1,343                                                            68,350
Accrued unbilled revenue                                                       17,529
Fuel, at average cost                                                          14,933
Materials and supplies,
  at average cost                                                              16,687
Gas in underground storage,
  at average cost                                                              31,405
Prepaid taxes                                                                   4,851
FAC/PGA underrecoveries                                                         2,284
Other                                                                           5,916
                                                                           ----------
     Total current assets                                                     170,046
                                                                           ----------
Deferred debits:
Unamortized loss on reacquired debt                                             2,509
Unamortized debt expense                                                        1,336
Prepaid pension cost                                                              229
Other                                                                          53,762
                                                                           ----------
     Total deferred debits                                                     57,836
                                                                           ----------
Total assets                                                               $1,070,166
                                                                           ==========



                                       13



                         CENTRAL ILLINOIS LIGHT COMPANY
                           Consolidated Balance Sheets
                                 (In thousands)
                                   (Unaudited)



                                                                            September 30, 2001
                                                                        
CAPITALIZATION AND LIABILITIES

Capitalization:
Common stockholder's equity:
   Common stock, no par value;
     authorized 20,000,000 shares;
     outstanding 13,563,871 shares                                              $  185,661
Additional paid-in capital                                                          27,000
Retained earnings                                                                  133,788
Accumulated other comprehensive income (loss)                                      (13,672)
                                                                                ----------
        Total common stockholder's equity                                          332,777
Preferred stock without mandatory
  redemption                                                                        19,120
Preferred stock with mandatory redemption                                           22,000
Long-term debt                                                                     242,718
                                                                                ----------
        Total capitalization                                                       616,615
                                                                                ----------
Current liabilities:
Current maturities of long-term debt                                                 2,800
Notes payable                                                                       58,000
Accounts payable                                                                    68,696
Accrued taxes                                                                       25,500
Accrued interest                                                                     4,920
FAC/PGA overrecoveries                                                                 311
Other                                                                               27,112
                                                                                ----------
        Total current liabilities                                                  187,339
                                                                                ----------
Deferred credits and other liabilities:
Deferred income taxes                                                              107,626
Regulatory liability                                                                57,985
Deferred investment tax credit                                                      14,954
Capital lease obligation                                                               159
Other                                                                               85,488
                                                                                ----------
        Total deferred credits and
          other liabilities                                                        266,212
                                                                                ----------
Total capitalization and
  liabilities                                                                   $1,070,166
                                                                                ==========



                                       14



ITEM (2) PER EXEMPTION ORDER (INCOME STATEMENT AMOUNTS ARE 12 MONTHS ENDED):

                         CILCO/CILCORP CONTRIBUTIONS TO
                    AES/CILCORP CONSOLIDATED HOLDING COMPANY
                                  (GAAP BASIS)
                                      ($MM)




     ---------------------------------------------------- -------------------- --------------------
                                                              12 MOS. 9/30/00      12 MOS. 9/30/01
     ---------------------------------------------------- -------------------- --------------------
                                                                          
     GROSS REVENUES %-CILCO                                            10.29%                8.87%
     CILCO                                                                609                  813
     AES                                                                5,903                8,296
     AES/CILCORP                                                        5,916                9,168
     ---------------------------------------------------- -------------------- --------------------
     GROSS REVENUES %-CILCORP                                          10.67%                9.51%
     CILCORP (Including CILCO)                                            631                  872
     AES                                                                5,903                8,296
     AES/CILCORP                                                        5,916                9,168
     ---------------------------------------------------- -------------------- --------------------
     NET OPERATING REVENUES %-CILCO                                     9.04%                6.06%
     CILCO                                                                393                  428
     AES                                                                4,416                6,591
     AES/CILCORP                                                        4,347                7,064
     ---------------------------------------------------- -------------------- --------------------
     NET OPERATING REVENUES %-CILCORP                                   9.25%                6.70%
     CILCORP (Including CILCO)                                            402                  473
     AES                                                                4,416                6,591
     AES/CILCORP                                                        4,347                7,064
     ---------------------------------------------------- -------------------- --------------------
     OPERATING INCOME %-CILCO                                           5.92%                4.02%
     CILCO                                                                 84                   83
     AES                                                                1,421                1,983
     AES/CILCORP                                                        1,419                2,066
     ---------------------------------------------------- -------------------- --------------------
     OPERATING INCOME %-CILCORP                                         5.00%                5.18%
     CILCORP (Including CILCO)                                             71                  107
     AES                                                                1,421                1,983
     AES/CILCORP                                                        1,419                2,066
     ---------------------------------------------------- -------------------- --------------------
     NET INCOME %-CILCO                                                 6.99%                7.62%
     CILCO                                                                 36                   34
     AES                                                                  532                  434
     AES/CILCORP                                                          515                  446
     ---------------------------------------------------- -------------------- --------------------
     NET INCOME %-CILCORP                                              -0.78%                2.69%
     CILCORP (Including CILCO)                                            (4)                   12
     AES                                                                  532                  434
     AES/CILCORP                                                          515                  446
     ---------------------------------------------------- -------------------- --------------------
     NET ASSETS %-CILCO                                                 3.56%                2.94%
     CILCO                                                              1,049                1,070
     AES                                                               29,470               34,523
     AES/CILCORP                                                       29,470               36,381
     ---------------------------------------------------- -------------------- --------------------
     NET ASSETS %-CILCORP                                               6.49%                5.11%
     CILCORP (Including CILCO)                                          1,912                1,858
     AES                                                               29,470               34,523
     AES/CILCORP                                                       29,470               36,381
     ---------------------------------------------------- -------------------- --------------------



                                       15



                         CILCO/CILCORP CONTRIBUTIONS TO
                    AES/CILCORP CONSOLIDATED HOLDING COMPANY
                         (PRO RATA CONSOLIDATION BASIS)
                                      ($MM)




     ---------------------------------------------------- -------------------- --------------------
                                                              12 MOS. 9/30/00      12 MOS. 9/30/01
     ---------------------------------------------------- -------------------- --------------------
                                                                          
     GROSS REVENUES %-CILCO                                             7.66%                7.92%
     CILCO                                                                609                  813
     AES                                                                7,935                9,389
     AES/CILCORP                                                        7,948               10,261
     ---------------------------------------------------- -------------------- --------------------
     GROSS REVENUES %-CILCORP                                           7.94%                8.50%
     CILCORP (Including CILCO)                                            631                  872
     AES                                                                7,935                9,389
     AES/CILCORP                                                        7,948               10,261
     ---------------------------------------------------- -------------------- --------------------
     NET OPERATING REVENUES %-CILCO                                     6.14%                5.16%
     CILCO                                                                393                  428
     AES                                                                6,468                7,819
     AES/CILCORP                                                        6,398                8,292
     ---------------------------------------------------- -------------------- --------------------
     NET OPERATING REVENUES %-CILCORP                                   6.28%                5.70%
     CILCORP (Including CILCO)                                            402                  473
     AES                                                                6,468                7,819
     AES/CILCORP                                                        6,398                8,292
     ---------------------------------------------------- -------------------- --------------------
     OPERATING INCOME %-CILCO                                           4.30%                3.42%
     CILCO                                                                 84                   83
     AES                                                                1,968                2,322
     AES/CILCORP                                                        1,953                2,429
     ---------------------------------------------------- -------------------- --------------------
     OPERATING INCOME %-CILCORP                                         3.63%                4.41%
     CILCORP (Including CILCO)                                             71                  107
     AES                                                                1,968                2,322
     AES/CILCORP                                                        1,953                2,429
     ---------------------------------------------------- -------------------- --------------------
     NET INCOME %-CILCO                                                 6.99%                7.62%
     CILCO                                                                 36                   34
     AES                                                                  532                  434
     AES/CILCORP                                                          515                  446
     ---------------------------------------------------- -------------------- --------------------
     NET INCOME %-CILCORP                                              -0.78%                2.69%
     CILCORP (Including CILCO)                                            (4)                   12
     AES                                                                  532                  434
     AES/CILCORP                                                          515                  446
     ---------------------------------------------------- -------------------- --------------------
     NET ASSETS %-CILCO                                                 2.98%                2.81%
     CILCO                                                              1,049                1,070
     AES                                                               35,176               36,277
     AES/CILCORP                                                       35,176               38,135
     ---------------------------------------------------- -------------------- --------------------
     NET ASSETS %-CILCORP                                               5.44%                4.87%
     CILCORP (Including CILCO)                                          1,912                1,858
     AES                                                               35,176               36,277
     AES/CILCORP                                                       35,176               38,135
     ---------------------------------------------------- -------------------- --------------------



                                       16



ITEM (3) PER EXEMPTION ORDER - GENERATION INFORMATION:

AES Generating Plants in Operation at September 30, 2001 (excluding CILCORP and
IPALCO):




                                                                        AES          AES
                                                        CAPACITY      INTEREST     EQUITY      REGULATORY
     UNIT                                  COUNTRY        (MW)          (%)          (MW)        STATUS
                                           -------        ----          ---          ----        ------
                                                                                 
     AES Deepwater                          USA           143           100          143           QF
     AES Beaver Valley                      USA           125           100          125           QF
     AES Placerita                          USA           120           100          120           QF
     AES Thames                             USA           181           100          181           QF
     AES Shady Point                        USA           320           100          320           QF
     AES Hawaii                             USA           180           100          180           QF
     AES Warrior Run                        USA           180           100          180           QF
     AES Somerset                           USA           675           100          675           EWG
     AES Cayuga                             USA           306           100          306           EWG
     AES Greenidge                          USA           161           100          161           EWG
     AES Westover                           USA           126           100          126           EWG
     AES Alamitos                           USA          2,083          100         2,083          EWG
     AES Redondo Beach                      USA          1,310          100         1,310          EWG
     AES Huntington Beach                   USA           563           100          563           EWG
     AES Thermo Ecotek - Hemphill           USA            14           67            9            QF
     AES Thermo Ecotek - Whitefield         USA            14           100          14            QF
     AES Thermo Ecotek - Mendota            USA            25           100          25            QF
     AES Delano                             USA            50           100          50            QF
     AES Riverside                          USA           154           100          154           EWG
     AES Mountainview                       USA           126           100          126           EWG
     DOMESTIC SUBTOTAL:                                 6,856                      6,851




                                                                        AES          AES
                                                        CAPACITY      INTEREST     EQUITY      REGULATORY
     UNIT                                  COUNTRY        (MW)          (%)          (MW)        STATUS
                                           -------        ----          ---          ----        ------
                                                                                 
     AES Kingston                          Canada         110           50           55            EWG
     AES San Nicholas                    Argentina        650           88           572           EWG
     AES Cabra Corral                    Argentina        102           98           100          FUCO
     AES El Tunal                        Argentina         10           98           10           FUCO
     AES Sarmiento                       Argentina         33           98           32           FUCO
     AES Ullum                           Argentina         45           98           44           FUCO
     AES Quebrada de Ullum               Argentina         45           100          45           FUCO
     AES Alicura                         Argentina       1,000          100         1,000         FUCO
     Fontes Nova - Light                   Brazil         144           21           30           FUCO
     Ilha dos Pombos - Light               Brazil         164           21           34           FUCO
     Nilo Pecanha - Light                  Brazil         380           21           80           FUCO
     Pereira Passos - Light                Brazil         100           21           21           FUCO
     CEMIG - Miranda                       Brazil         390            9           35           FUCO
     CEMIG - Igarapava                     Brazil         210            1            2           FUCO
     CEMIG (35 plants)                     Brazil        5,068           9           441          FUCO
     AES Bayano                            Panama         150           49           74           FUCO


                                       17





                                                                        AES          AES
                                                        CAPACITY      INTEREST     EQUITY      REGULATORY
     UNIT                                  COUNTRY        (MW)          (%)          (MW)        STATUS
                                           -------        ----          ---          ----        ------
                                                                                 
     AES Panama                            Panama          42           49           21           FUCO
     AES Chiriqui - La Estrella            Panama          42           49           21           FUCO
     AES Chiriqui - Los Valles             Panama          48           49           24           FUCO
     AES Los Mina                        Dom. Rep.        210           100          210           EWG
     AES Yarra                           Australia        510           100          510          FUCO
     AES Jeeralang                       Australia        449           100          449          FUCO
     AES Mt. Stuart                      Australia        288           100          288          FUCO
     AES Xiangci - Cili                    China           26           51           13           FUCO
     Wuhu Grassy Lake                      China          250           25           63           FUCO
     Yangchun                              China           15           25            4           FUCO
     Chengdu Lotus City                    China           48           35           17           FUCO
     AES Jiaozuo                           China          250           70           175          FUCO
     AES Hefei                             China           76           70           53           FUCO
     AES Hefei II                          China           39           70           27           FUCO
     AES Chongqing Nanchuan                China           50           70           35           FUCO
     Yangcheng                             China          350           25           88           FUCO
     AES Ekibastuz                       Kazakhstan      4,000          100         4,000         FUCO
     AES Ust-Kamenogorsk GES             Kazakhstan       331           100          331          FUCO
     AES Shulbinsk GES                   Kazakhstan       702           100          702          FUCO
     AES Ust-Kamenogorsk TETS            Kazakhstan      1,464          100         1,464         FUCO
     AES Leninogorsk TETS                Kazakhstan       418           100          418          FUCO
     AES Sogrinsk TETS                   Kazakhstan       349           100          349          FUCO
     AES Semipalatinsk TETS              Kazakhstan       840           100          840          FUCO
     AES Ust-Kamenogorsk Heat Nets       Kazakhstan       310          Mgmt.          0           FUCO
     OPGC                                  India          420           49           206          FUCO
     AES Lal Pir                          Pakistan        351           90           316          FUCO
     AES PakGen                           Pakistan        344           90           310          FUCO
     AES Borsod                           Hungary         171           100          171          FUCO
     AES Tisza II                         Hungary         860           100          860          FUCO
     AES Tiszapalkonya                    Hungary         250           100          250          FUCO
     AES Elsta                          Netherlands       405           50           203          FUCO
     Medway                                 U.K.          688           25           172          FUCO
     AES Indian Queens                      U.K.          140           100          140           EWG
     AES Kilroot                            U.K.          520           97           504          FUCO
     AES Belfast West                       U.K.          120           97           116          FUCO
     AES Barry                              U.K.          230           100          230          FUCO
     AES Drax                               U.K.         4,065          100         4,065         FUCO
     AES Fifoots Point                      U.K.          360           100          360          FUCO
     AES Uruguaiana                        Brazil         600           100          600          FUCO
     AES Tiete (10 plants)                 Brazil        2,650          53          1,405         FUCO
     EDC (4 plants)                      Venezuela       2,265          87          1,971         FUCO
     AES Merida III                        Mexico         484           55           266          FUCO
     AES Mtkvari                          Georgia         600           100          600          FUCO
     AES Khrami I                         Georgia         113           100          113          FUCO
     AES Khrami II                        Georgia         110           100          110          FUCO
     AES Ottana                            Italy          140           100          140          FUCO
     AES Mamonal                          Columbia         90           62           56           FUCO
     AES Centrogener (Gener - 8            Chile          756           99           748          FUCO
         plants)



                                       18





                                                                        AES          AES
                                                        CAPACITY      INTEREST     EQUITY      REGULATORY
     UNIT                                  COUNTRY        (MW)          (%)          (MW)        STATUS
                                           -------        ----          ---          ----        ------
                                                                                 
     AES Chivor (Gener)                   Columbia       1,000          96           960          FUCO
     AES Electrica de Santiago (Gener)     Chile          379           74           280          FUCO
     AES Energia Verde (Gener - 2          Chile           17           99           17           FUCO
         plants)
     AES Guacolda (Gener)                  Chile          304           49           149          FUCO
     AES Norgener (Gener - 2 plants)       Chile          277           99           274          FUCO
     Itabo (Gener - 7 plants)            Dom. Rep.        587           24           141          FUCO
     AES Bohemia                         Czech Rep.        50           83           42           FUCO
     AES Premnitz                         Germany          58           65           38           FUCO
     AES SONEL                            Cameroon        800           56           560          FUCO
     Central Dique                       Argentina         68           51           35           FUCO
     FOREIGN SUBTOTAL:                                 39,980                    29,085

     TOTAL - September 30, 2001                          46,836                    35,936
     Foreign Generation as a
     Percentage of Total:                                 85%                        81%



CILCORP Generating Plants at September 30, 2001:



                                                                        AES          AES
                                                        CAPACITY      INTEREST     EQUITY      REGULATORY
     UNIT                                  COUNTRY        (MW)          (%)          (MW)        STATUS
                                           -------        ----          ---          ----        ------
                                                                                 
     Edwards (3 units)                        USA          740         100          740            IL PUC
     Duck Creek                               USA          366         100          366            IL PUC
     Indian Trails                            USA          10          100          10             IL PUC
     Sterling Avenue                          USA          30          100          30             IL PUC
     Hallock Power Modules                    USA          13          100          13             IL PUC
     Kickapoo Power Modules                   USA          13          100          13             IL PUC
     TOTAL - September 30, 2001                           1,172                    1,172



Revenues from electric generation capacity - 12 months ended September 30, 2001
(millions of dollars):


                                                                                  
         CILCORP                                                             158                 4%
         AES (excluding CILCORP)(1)                                        3,999                96%
                                                                      -----------        -----------
         Total                                                             4,157               100%




----------------
1   Includes revenues from electric generating capacity owned by IPALCO.


                                       19



CILCORP's electric revenues are allocated between electric generation and
electric transmission and distribution activities according to utility rate
base. AES generation revenues are derived from the total generation revenues
earned by AES subsidiaries times the percentage ownership interest of AES in
those subsidiaries.

There has been no change in the amount of generation capacity owned by CILCORP
and a 994 MW increase in the amount of generation capacity owned by AES
(excluding CILCORP and IPALCO) from 34,942 to 35,936 MW since June 30, 2001.
There has been a 5.5% increase in the total revenues earned from the capacity
owned by AES and CILCORP in the twelve-month period ended September 30, 2001
compared with the twelve-month period ended June 30, 2001. The percentage of
total revenues derived from the generation capacity owned by CILCORP has
remained the same at 4%.

The physical location of the MW capacity added by AES since June 30, 2001 is in
the United States, Argentina and Cameroon.

ITEM (4) PER EXEMPTION ORDER - ELECTRIC TRANSMISSION AND DISTRIBUTION AND
                               GAS DISTRIBUTION:


Electric transmission and distribution and gas distribution assets owned as of
September 30, 2001 (millions of dollars):


                                                                  
         CILCORP                                                                  766
         Total AES (excluding CILCORP)(2)                                       5,974
                                                                      ----------------
         Total                                                                  6,740


Electric transmission and distribution and gas distribution revenues for 12
months ending September 30, 2001 (millions of dollars):


                                                                   
         CILCORP                                                                  568
         AES (excluding CILCORP)(3)                                             5,536
                                                                      ----------------
         Total                                                                  6,104


CILCORP's electric revenues are allocated between electric generation and
electric transmission and distribution activities according to utility rate
base. AES transmission and distribution revenues are derived from the total
revenues earned by AES transmission and distribution subsidiaries by multiplying
these revenues by the percentage ownership interest of AES in those
subsidiaries.


--------------------
2   Includes transmission and distribution assets owned by IPALCO.
3   Includes revenues from transmission and distribution assets owned by IPALCO.


                                       20



The total transmission and distribution assets owned by AES and CILCORP have
decreased since June 30, 2001. CILCORP's transmission and distribution assets
have increased slightly while the revenues derived from such assets have
decreased slightly since June 30, 2001. AES' transmission and distribution
assets have decreased slightly and the revenues derived from such assets have
increased since June 30, 2001. CILCORP's percentage of the total transmission
and distribution assets has remained the same at 11%, and CILCORP's percentage
of the total revenues from such assets has decreased from 10% to 9% for the
twelve-month period ending September 30, 2001 compared to the twelve-month
period ending June 30, 2001.

ITEM (5) PER EXEMPTION ORDER:

CILCO has not sold or transferred any electric and/or gas utility assets to any
affiliate company of the AES consolidated holding company system during the
third quarter of 2001.

ITEM (6) PER EXEMPTION ORDER:

During the third quarter of 2001, no application has been made to nor has any
order been received from the Illinois Commerce Commission that involves AES'
ownership position or AES' oversight over the operations of CILCO or CILCORP.

                                    SIGNATURE

Pursuant to the requirements of the Public Utility Holding Company Act of 1935,
as amended, AES has duly caused this certificate to be signed on its behalf on
this 29th day of November, 2001 by the undersigned thereunto duly authorized.

                                               The AES Corporation


                                           By: /s/ Erik Luckau
                                               -------------------------
                                               Erik Luckau
                                               Associate General Counsel


                                       21