Exelon Corporation - Rule 24-CERT -
Certificate Concerning Terms and Conditions                Date Filed: 8/29/2001
--------------------------------------------------------------------------------

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


In the Matter of                                              CERTIFICATE
Exelon Corporation                                                OF
File No. 70-9693                                             NOTIFICATION

Public Utility Holding Company Act of 1935 (PUHCA)

     Exelon  Corporation,  a Pennsylvania  corporation  and  registered  holding
company  (Exelon),  hereby  submits the following  Certificate  of  Notification
pursuant  to Rule  24.  This  filing  is made  pursuant  to  Exelon's  Form  U-1
Application-Declaration, as amended (the "Financing U-1") and the Securities and
Exchange  Commission's  orders dated November 2, 2000 and December 8, 2000. This
certificate  reports  activity in File No.  70-9693 for the period April 1, 2001
through June 30, 2001. Any capitalized  terms used herein but not defined herein
have the  respective  meanings  given in the Financing  U-1 or the  Commission's
Orders.

1.   As determined  pursuant to the December 8, 2000 Order, the Modified Rule 53
     Test  applicable  to  Exelon's  investments  in EWGs and FUCOs is  $4,000.0
     million. At June 30, 2001,  Exelon's "aggregate  investment" (as defined in
     rule  53(a)  under  PUHCA) in all EWGs and FUCOs was  approximately  $744.0
     million,  and accordingly,  at June 30, 2001, Exelon's remaining investment
     capacity  under  the  Modified  Rule 53  Test  was  approximately  $3,256.0
     million.  At June 30, 2001, Exelon's  "consolidated  retained earnings" (as
     defined in rule 53(a) under the PUHCA) was approximately $755.0 million.

     Note: In its quarterly Rule 24  certificate  for the first quarter of 2001,
     filed May 30, 2001,  Exelon reported an "aggregate  investment" in EWGs and
     FUCOs of $770 million.  This number is in error,  as it included  growth in
     retained  earnings  and  not any  additional  investments.  The  "aggregate
     investment" in EWGs and FUCOs has not changed from the amount of "aggregate
     investment" initially disclosed, $744 million.

2.   Pursuant  to a request  for  confidential  treatment  under rule  104(b) of
     PUHCA,  Exelon is concurrently filing in paper format as Exhibit A, certain
     information concerning the aggregate investment by EWG/FUCO Project.

3.   At June 30, 2001, Exelon's consolidated capitalization ratio was: debt 65%,
     common equity 32%, and preferred  securities  of  subsidiaries  of 3%. (For
     these purposes,  "consolidated  debt" means all long-term  debt,  long-term
     debt due within one year, notes payable and other  short-term  obligations,
     including any short-term debt and non-recourse  debt of EWG/FUCO  Projects,
     to the extent normally  consolidated under applicable  financial  reporting
     rules).

4.   At June 30, 2001,  the  market-to-book  ratio of Exelon's  common stock was
     2.76.

5.   In the second quarter of 2001, Exelon did not invest or commit to invest in
     an EWG or FUCO that would count against the Modified Rule 53 Test.

6.   Pursuant  to a request  for  confidential  treatment  under rule  104(b) of
     PUHCA,  Exelon is concurrently filing in paper format as Exhibit A, certain
     information  concerning  aggregate  investment  by EWG and FUCO Project and
     related growth in retained earnings.

7.   Pursuant  to a request  for  confidential  treatment  under rule  104(b) of
     PUHCA,  Exelon is concurrently filing in paper format as Exhibit A, certain
     information concerning aggregate investment by EWG/FUCO Project, net income
     and revenues of Exelon's EWG and FUCO Projects.

8.   Sale of any Common Stock or Preferred  Securities  issued by Exelon  during
     the second quarter of 2001, and the purchase price per share and the market
     price per share at the date of the agreement of sale.

--------------------------------------------------------------------------------

Exelon Corporation - Rule 24-CERT -
Certificate Concerning Terms and Conditions                Date Filed: 8/29/2001
--------------------------------------------------------------------------------

          During  the  second  quarter  of  2001,  515,823  stock  options  were
          exercised and shares were issued under various  employee  compensation
          plans with a price  range of $63.15 to $70.26 per share.  The  average
          price for the period was $66.99.

9.   Options issued or issuable during quarter.

          Exelon  granted  48,700 stock options in the second quarter of 2001 at
          exercise prices ranging from $67.29 to $69.79 per share.

10.  Exelon did not  transfer any common  stock to a seller of  securities  of a
     company being acquired during the second quarter of 2001.

11.  Guarantees issued.

     The following guarantees were issued during the second quarter of 2001:



       Name of Parent
       --------------
          Purpose          Name of Subsidiary                 Amount                 Terms
          -------          ------------------                 ------                 -----

                                                                             
       Exelon              PECO Energy                        $100,000,000            12 Months
       Workman's Compensation

       Exelon              Exelon Enterprises                 $106,174,798            12 Months
       Insurance Support

       Exelon              Exelon Generation Company          $52,385,000             12 Months
       Credit Support

       Exelon              Exelon Generation Company          $288,501,640            12 Months
       Power Marketing


12.  Exelon indebtedness issued during the second quarter of 2001.

     A.   Commercial  paper issued  through  Chase  Manhattan  Bank on behalf of
          Exelon  during the second  quarter,  ranging  from $65 million to $402
          million at an average interest rate of 4.41%.

13.  Amount and terms of any  short-term  debt issued by any Utility  Subsidiary
     during the second quarter of 2001.

     A.   Commercial  paper issued through Bank One on behalf of PECO during the
          second  quarter,  ranging  from  $32 to $471  million,  at an  average
          interest rate of 4.55%.

     B.   Contributions to and Loans From the Utility Money Pool




                                        Contributions to the Utility Money Pool
                                        Outstanding Amounts

     Date                    ComEd                      PECO                     Total
----------------      --------------------      --------------------      --------------------
                                                                  
04/01/01               $352,000,000             -                          $352,000,000
04/02/01               $352,000,000             -                          $352,000,000


--------------------------------------------------------------------------------



Exelon Corporation - Rule 24-CERT -
Certificate Concerning Terms and Conditions                Date Filed: 8/29/2001
--------------------------------------------------------------------------------

04/03/01               $352,000,000             -                          $352,000,000
04/04/01               $352,000,000             -                          $352,000,000
04/05/01               $352,000,000             -                          $352,000,000
04/06/01               $352,000,000             -                          $352,000,000
04/07/01               $352,000,000             -                          $352,000,000
04/08/01               $352,000,000             -                          $352,000,000
04/09/01               $352,000,000             -                          $352,000,000
04/10/01               $352,000,000             -                          $352,000,000
04/11/01               $352,000,000             -                          $352,000,000
04/12/01               $352,000,000             -                          $352,000,000
04/13/01               $352,000,000             -                          $352,000,000
04/14/01               $352,000,000             -                          $352,000,000
04/15/01               $352,000,000             -                          $352,000,000
04/16/01               $352,000,000             -                          $352,000,000
04/17/01               $352,000,000             -                          $352,000,000
04/18/01               $352,000,000             -                          $352,000,000
04/19/01               $352,000,000             -                          $352,000,000
04/20/01               $352,000,000             -                          $352,000,000
04/21/01               $352,000,000             -                          $352,000,000
04/22/01               $352,000,000             -                          $352,000,000
04/23/01               $352,000,000             -                          $352,000,000
04/24/01               $352,000,000             -                          $352,000,000
04/25/01               $352,000,000             -                          $352,000,000
04/26/01               $352,000,000             -                          $352,000,000
04/27/01               $352,000,000             -                          $352,000,000
04/28/01               $352,000,000             -                          $352,000,000
04/29/01               $352,000,000             -                          $352,000,000
04/30/01               $352,000,000             -                          $352,000,000

05/01/01               $352,000,000             -                          $352,000,000
05/02/01               $352,000,000             -                          $352,000,000
05/03/01               $352,000,000             -                          $352,000,000
05/04/01               $352,000,000             -                          $352,000,000
05/05/01               $352,000,000             -                          $352,000,000
05/06/01               $352,000,000             -                          $352,000,000
05/07/01               $352,000,000             -                          $352,000,000
05/08/01               $352,000,000             -                          $352,000,000
05/09/01               $352,000,000             -                          $352,000,000
05/10/01               $352,000,000             -                          $352,000,000
05/11/01               $352,000,000             -                          $352,000,000
05/12/01               $352,000,000             -                          $352,000,000
05/13/01               $352,000,000             -                          $352,000,000
05/14/01               $352,000,000             -                          $352,000,000
05/15/01               $352,000,000             -                          $352,000,000
05/16/01               $352,000,000             -                          $352,000,000
05/17/01               $352,000,000             -                          $352,000,000
05/18/01               $200,000,000             -                          $200,000,000
05/19/01               $200,000,000             -                          $200,000,000
05/20/01               $200,000,000             -                          $200,000,000
05/21/01               $200,000,000             -                          $200,000,000
05/22/01               $200,000,000             -                          $200,000,000
05/23/01               $200,000,000             -                          $200,000,000
05/24/01               $200,000,000             -                          $200,000,000
05/25/01               $200,000,000             -                          $200,000,000
05/26/01               $200,000,000             -                          $200,000,000


--------------------------------------------------------------------------------



Exelon Corporation - Rule 24-CERT -
Certificate Concerning Terms and Conditions                Date Filed: 8/29/2001
--------------------------------------------------------------------------------

05/27/01               $200,000,000             -                          $200,000,000
05/28/01               $200,000,000             -                          $200,000,000
05/29/01               $100,000,000             -                          $100,000,000
05/30/01               $  50,000,000            -                          $  50,000,000
05/31/01              -                         -                         -

06/01/01              -                         -                         -
06/02/01              -                         -                         -
06/03/01              -                         -                         -
06/04/01              -                         -                         -
06/05/01              -                         -                         -
06/06/01              -                         -                         -
06/07/01              -                         -                         -
06/08/01              -                         -                         -
06/09/01              -                         -                         -
06/10/01              -                         -                         -
06/11/01              -                         -                         -
06/12/01              -                         -                         -
06/13/01              -                         -                         -
06/14/01              -                         -                         -
06/15/01              -                         -                         -
06/16/01              -                         -                         -
06/17/01              -                         -                         -
06/18/01              -                         -                         -
06/19/01              -                         -                         -
06/20/01              -                         -                         -
06/21/01              -                         -                         -
06/22/01              -                         -                         -
06/23/01              -                         -                         -
06/24/01              -                         -                         -
06/25/01              -                         -                         -
06/26/01              -                         -                         -
06/27/01              -                         -                         -
06/28/01              -                         -                         -
06/29/01              -                         -                         -
06/30/01              -                         -                         -





                                  Loans from Utility Money Pool
                                       Outstanding Amounts

     Date                    ComEd                     PECO                      Total
----------------      --------------------      --------------------      --------------------

                                                                  
04/01/01              -                          $352,000,000              $352,000,000
04/02/01              -                          $352,000,000              $352,000,000
04/03/01              -                          $352,000,000              $352,000,000
04/04/01              -                          $352,000,000              $352,000,000
04/05/01              -                          $352,000,000              $352,000,000
04/06/01              -                          $352,000,000              $352,000,000
04/07/01              -                          $352,000,000              $352,000,000
04/08/01              -                          $352,000,000              $352,000,000
04/09/01              -                          $352,000,000              $352,000,000
04/10/01              -                          $352,000,000              $352,000,000


--------------------------------------------------------------------------------



Exelon Corporation - Rule 24-CERT -
Certificate Concerning Terms and Conditions                Date Filed: 8/29/2001
--------------------------------------------------------------------------------

04/11/01              -                          $352,000,000              $352,000,000
04/12/01              -                          $352,000,000              $352,000,000
04/13/01              -                          $352,000,000              $352,000,000
04/14/01              -                          $352,000,000              $352,000,000
04/15/01              -                          $352,000,000              $352,000,000
04/16/01              -                          $352,000,000              $352,000,000
04/17/01              -                          $352,000,000              $352,000,000
04/18/01              -                          $352,000,000              $352,000,000
04/19/01              -                          $352,000,000              $352,000,000
04/20/01              -                          $352,000,000              $352,000,000
04/21/01              -                          $352,000,000              $352,000,000
04/22/01              -                          $352,000,000              $352,000,000
04/23/01              -                          $352,000,000              $352,000,000
04/24/01              -                          $352,000,000              $352,000,000
04/25/01              -                          $352,000,000              $352,000,000
04/26/01              -                          $352,000,000              $352,000,000
04/27/01              -                          $352,000,000              $352,000,000
04/28/01              -                          $352,000,000              $352,000,000
04/29/01              -                          $352,000,000              $352,000,000
04/30/01              -                          $352,000,000              $352,000,000

05/01/01              -                          $352,000,000              $352,000,000
05/02/01              -                          $352,000,000              $352,000,000
05/03/01              -                          $352,000,000              $352,000,000
05/04/01              -                          $352,000,000              $352,000,000
05/05/01              -                          $352,000,000              $352,000,000
05/06/01              -                          $352,000,000              $352,000,000
05/07/01              -                          $352,000,000              $352,000,000
05/08/01              -                          $352,000,000              $352,000,000
05/09/01              -                          $352,000,000              $352,000,000
05/10/01              -                          $352,000,000              $352,000,000
05/11/01              -                          $352,000,000              $352,000,000
05/12/01              -                          $352,000,000              $352,000,000
05/13/01              -                          $352,000,000              $352,000,000
05/14/01              -                          $352,000,000              $352,000,000
05/15/01              -                          $352,000,000              $352,000,000
05/16/01              -                          $352,000,000              $352,000,000
05/17/01              -                          $352,000,000              $352,000,000
05/18/01              -                          $200,000,000              $200,000,000
05/19/01              -                          $200,000,000              $200,000,000
05/20/01              -                          $200,000,000              $200,000,000
05/21/01              -                          $200,000,000              $200,000,000
05/22/01              -                          $200,000,000              $200,000,000
05/23/01              -                          $200,000,000              $200,000,000
05/24/01              -                          $200,000,000              $200,000,000
05/25/01              -                          $200,000,000              $200,000,000
05/26/01              -                          $200,000,000              $200,000,000
05/27/01              -                          $200,000,000              $200,000,000
05/28/01              -                          $200,000,000              $200,000,000
05/29/01                                         $100,000,000              $100,000,000
05/30/01                                         $  50,000,000             $  50,000,000
05/31/01                                        -                         -

06/01/01              -                         -                         -
06/02/01              -                         -                         -

--------------------------------------------------------------------------------



Exelon Corporation - Rule 24-CERT -
Certificate Concerning Terms and Conditions                Date Filed: 8/29/2001
--------------------------------------------------------------------------------

06/03/01              -                         -                         -
06/04/01              -                         -                         -
06/05/01              -                         -                         -
06/06/01              -                         -                         -
06/07/01              -                         -                         -
06/08/01              -                         -                         -
06/09/01              -                         -                         -
06/10/01              -                         -                         -
06/11/01              -                         -                         -
06/12/01              -                         -                         -
06/13/01              -                         -                         -
06/14/01              -                         -                         -
06/15/01              -                         -                         -
06/16/01              -                         -                         -
06/17/01              -                         -                         -
06/18/01              -                         -                         -
06/19/01              -                         -                         -
06/20/01              -                         -                         -
06/21/01              -                         -                         -
06/22/01              -                         -                         -
06/23/01              -                         -                         -
06/24/01              -                         -                         -
06/25/01              -                         -                         -
06/26/01              -                         -                         -
06/27/01              -                         -                         -
06/28/01              -                         -                         -
06/29/01              -                         -                         -
06/30/01              -                         -                         -




Interest Rates for Utility Money Pool

     Date                Interest Rate
----------------      --------------------

04/01/01                     5.26%
04/02/01                     5.25%
04/03/01                     5.16%
04/04/01                     5.14%
04/05/01                     5.13%
04/06/01                     5.12%
04/07/01                     5.12%
04/08/01                     5.12%
04/09/01                     5.14%
04/10/01                     5.08%
04/11/01                     5.07%
04/12/01                     5.08%
04/13/01                     5.08%
04/14/01                     5.08%
04/15/01                     5.08%
04/16/01                     5.11%


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Exelon Corporation - Rule 24-CERT -
Certificate Concerning Terms and Conditions                Date Filed: 8/29/2001
--------------------------------------------------------------------------------

04/17/01                     5.09%
04/18/01                     5.05%
04/19/01                     4.91%
04/20/01                     4.86%
04/21/01                     4.86%
04/22/01                     4.86%
04/23/01                     4.83%
04/24/01                     4.82%
04/25/01                     4.80%
04/26/01                     4.79%
04/27/01                     4.81%
04/28/01                     4.81%
04/29/01                     4.81%
04/30/01                     4.82%

05/01/01                     4.77%
05/02/01                     4.71%
05/03/01                     4.71%
05/04/01                     4.66%
05/05/01                     4.66%
05/06/01                     4.66%
05/07/01                     4.66%
05/08/01                     4.61%
05/09/01                     4.57%
05/10/01                     4.57%
05/11/01                     4.63%
05/12/01                     4.63%
05/13/01                     4.63%
05/14/01                     4.58%
05/15/01                     4.58%
05/16/01                     4.49%
05/17/01                     4.50%
05/18/01                     4.42%
05/19/01                     4.42%
05/20/01                     4.42%
05/21/01                     4.41%
05/22/01                     4.41%
05/23/01                     4.36%
05/24/01                     4.35%
05/25/01                     4.31%
05/26/01                     4.31%
05/27/01                     4.31%
05/28/01                     4.31%
05/29/01                     4.32%
05/30/01                     4.32%
05/31/01                     4.30%

06/01/01                       -
06/02/01                       -
06/03/01                       -
06/04/01                       -
06/05/01                       -
06/06/01                       -
06/07/01                       -
06/08/01                       -


--------------------------------------------------------------------------------



Exelon Corporation - Rule 24-CERT -
Certificate Concerning Terms and Conditions                Date Filed: 8/29/2001
--------------------------------------------------------------------------------

06/09/01                       -
06/10/01                       -
06/11/01                       -
06/12/01                       -
06/13/01                       -
06/14/01                       -
06/15/01                       -
06/16/01                       -
06/17/01                       -
06/18/01                       -
06/19/01                       -
06/20/01                       -
06/21/01                       -
06/22/01                       -
06/23/01                       -
06/24/01                       -
06/25/01                       -
06/26/01                       -
06/27/01                       -
06/28/01                       -
06/29/01                       -
06/30/01                       -



14.  During the second  quarter of 2001, no financings  were  consummated by any
     Non-Utility Subsidiary not exempt under Rule 52.

15.  Notional   amount  and  principal   terms  of  any  hedge   instruments  or
     anticipatory  hedges  entered  into  during the second  quarter of 2001 and
     parties thereto.

          During  the  second  quarter  of 2001,  Exelon  entered  into  forward
          starting  interest rate swap  arrangements  in order to hedge interest
          rate  exposure on a debt offering in the second  quarter of 2001.  The
          interest  rate swaps are  forward  starting on or before June 30, 2001
          and exchange three-month LIBOR for the fixed bid rate.

16.  The name, parent company and amount invested in any intermediate subsidiary
     or financing  subsidiary  during the second  quarter of 2001 and the amount
     and terms of any securities issued by such subsidiaries during the quarter.



       Parent Company                       Subsidiary Company                          Total Amount
       --------------                       ------------------                          ------------
                                                                                  
       Exelon Generation Company, LLC       Exelon Generation Finance Co., LLC          $698,806,735


17.  A list of U-6B-2 forms filed with the Commission  during the second quarter
     of 2001, including the name of the filing entity and the date of filing.

          Report filed for Exelon, ComEd, PECO, Exelon Business Services Company
          and Exelon Enterprises Company, May 30, 2001.

18.  The  consolidated  and separate balance sheets of each company that engaged
     in jurisdictional financing transactions during the second quarter of 2001.

          Exelon,  PECO and ComEd  Balance  Sheets  are  incorporated  herein by
          reference to the quarterly  reports on Form 10-Q for Exelon,  PECO and
          ComEd for the period ended June 30, 2001.


--------------------------------------------------------------------------------



Exelon Corporation - Rule 24-CERT -
Certificate Concerning Terms and Conditions                Date Filed: 8/29/2001
--------------------------------------------------------------------------------

19.  Capital  Structure  of Exelon and its utility  subsidiaries  as of June 30,
     2001 are as follows (in millions, except percentage data):



               Debt 1                  Common Equity          Preferred Securities of Subsidiaries
          Amount    Percentage      Amount     Percentage          Amount     Percentage
          ------    ----------      ------     ----------          ------     ----------
                                                                
Exelon   $15,195       65%          $7,550        32%               $630          3%





                                                                   Preferred Stock and Mandatorily Redeemable
                       Debt 1                    Common Equity           Preferred Stock of a Subsidiary
                  Amount     Percentage       Amount     Percentage         Amount       Percentage
                  ------     ----------       ------     ----------         ------       ----------
                                                                           
PECO              $5,939        92%            $243          4%              $302            5%

ComEd             $7,070        57%          $5,053         41%              $335            3%


     1    see definition under Item 3.




20.  The consolidated  retained earnings analyses of Exelon,  PECO and ComEd are
     attached as Exhibit B.


21.  Registration statements filed under the Securities Act of 1933 with respect
     to securities  that are the subject of the Financing U-1,  incorporated  by
     reference into this Certificate of Notification.


          None.

--------------------------------------------------------------------------------



Exelon Corporation - Rule 24-CERT -
Certificate Concerning Terms and Conditions                Date Filed: 8/29/2001
--------------------------------------------------------------------------------


                                S I G N A T U R E

     Pursuant to the  requirements of PUHCA,  the  undersigned  company has duly
caused  this  document to be signed on its behalf by the  undersigned  thereunto
duly authorized.

Date:  August 29, 2001

                                                   EXELON CORPORATION

                                                   By: /s/ Jean H. Gibson
                                                       -------------------------
                                                   Vice President and Controller


--------------------------------------------------------------------------------



Exelon Corporation - Rule 24-CERT -
Certificate Concerning Terms and Conditions                Date Filed: 8/29/2001
--------------------------------------------------------------------------------

                                                                      Exhibit B
                                                                     Page 1 of 1


                   Exelon Corporation and Subsidiary Companies
                           Retained Earnings Analysis
                       For the Quarter Ended June 30, 2001
                                  (In millions)


Beginning Balance                                      $570
Net Income                                              315
Dividends:
   Common Stock                                        (136)
   Tax benefit on stock options exercised                 6
                                                       ----
Ending Balance                                         $755
                                                       ====



                  PECO Energy Company and Subsidiary Companies
                           Retained Earnings Analysis
                       For the Quarter Ended June 30, 2001
                                  (In millions)


Beginning Balance                                      $272
Net Income                                               85
Dividends:
   Common Stock                                         (55)
   Preferred Stock                                       (3)
                                                       ----
Ending Balance                                         $299
                                                       ====


                  Commonwealth Edison and Subsidiary Companies
                           Retained Earnings Analysis
                       For the Quarter Ended June 30, 2001
                                  (In millions)


Beginning Balance                                      $216
  Net Income                                            183
  Dividends:
     Common Stock                                       (85)
                                                       ----
Ending Balance                                         $314
                                                       ====



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