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              RETENTION PROGRAM FOR KEY EMPLOYEES OF PUBLIC SERVICE
                         ENTERPRISE GROUP INCORPORATED

                             AMENDED APRIL 18, 2006

                  The Retention Program for Key Employees of Public Service
Enterprise Group Incorporated is intended to reward selected officers and key
employees of Public Service Enterprise Group Incorporated ("Enterprise") who
continue to provide services to Enterprise after the date of the Merger
Agreement between Exelon Corporation and Enterprise. This Program automatically
incorporates all applicable restrictions of the American Jobs Creation Act of
2004 (the "AJCA") and guidance issued by the Department of Treasury under the
AJCA, and Enterprise will amend the Program to the extent necessary to comply
with such requirements. The AJCA, which became law on October 22, 2004, provides
that payments due to a change in the ownership or effective control of the
employer must comply with guidance issued by the Department of Treasury. The
AJCA and any Treasury guidance issued to implement the AJCA may result in
additional restrictions on a Key Employee's rights relating to compensation
considered to be deferred under this Program. The timing under which a Key
Employee has a right to receive any payment under the Program will automatically
be modified, and a Key Employee's rights under the Program shall be limited as
necessary to conform to any requirements under the AJCA and such guidance.

                  Subject to the foregoing, the Program shall be operated and
administered in accordance with the following terms and conditions:

                  1.       DEFINITIONS.

                           a. "Annual Base Salary" means the annual
         compensation, excluding bonuses, commissions, overtime, incentive
         payments, perquisite allowances, non-monetary awards, director fees and
         other fees, relocation expense reimbursements, auto allowances, imputed
         income from group term life insurance, and any other non-recurring
         items, paid to or on behalf of a Key Employee for services rendered to
         Enterprise, before reduction for compensation deferred pursuant to all
         qualified, nonqualified and cafeteria plans of Enterprise.

                           b. "Cause" means (i) the willful and continued
         failure of a Key Employee substantially to perform his duties, (ii)
         willful engagement in gross misconduct materially and demonstrably
         injurious to Enterprise, (iii) willful violation of Enterprise's
         Standards of Integrity or other applicable corporate code of conduct,
         or (iv) conviction of a felony. No act or failure to act on the part of
         a Key Employee shall be considered "willful" unless it is done or
         omitted by the Key Employee in bad faith or without reasonable belief
         that the Key Employee's action or omission was in the best interest of
         Enterprise.

                           c. "Committee" means the Organization and
         Compensation Committee of the Board of Directors of Enterprise.

                           d. "Earned Date" means the date that is ninety (90)
         days after the Effective Time.




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                           e. "Effective Time" has the meaning ascribed to such
         term in the Merger Agreement.

                           f. "Key Employee" means an officer or key employee of
         Enterprise who meets the requirements of eligibility for participation
         in the Program and who is selected by the Committee to receive a Key
         Employee Retention Payment.

                           g. "Key Employee Retention Payment" means the cash
         payment paid to Key Employees and Qualifying Key Employees under the
         Program.

                           h. "Merger Agreement" means the merger agreement
         between Exelon Corporation and Enterprise, dated as of December 20,
         2004.

                           i. "Merger Agreement Date" means the date on which
         the Merger Agreement is executed by Exelon Corporation and Enterprise.

                           h. "Program" means this Retention Program for Key
         Employees of Enterprise.

                           h. "Qualifying Key Employee" means those Key
         Employees who are continuously employed with Enterprise and Exelon
         Corporation from the date of the Merger Agreement through the Earned
         Date.

                           i. All capitalized terms not otherwise defined herein
         shall be ascribed the definition ascribed to each such term pursuant to
         the Merger Agreement.

                  2. ELIGIBILITY. The Committee, in its sole discretion, shall
select, from those officers and key employees of Enterprise who are employed by
Enterprise as of the Merger Agreement Date, Key Employees to participate in the
Program. The Committee may delegate the selection of Key Employees who are not
officers and the establishment of Key Employee Retention Payments to the Chief
Executive Officer of Enterprise.

                  3. AMOUNT. The Committee, in its sole discretion, shall
determine the total amount of the Key Employee Retention Payment to be paid to
each Key Employee, which amount shall not be less than 40% of the Key Employee's
Annual Base Salary and shall not exceed 150% of the Key Employee's Annual Base
Salary. For purposes of the Program, the amount of a Key Employee's Annual Base
Salary shall be determined as of the Merger Agreement Date.

                  4. PAYMENT SCHEDULE.

                           a. Except as provided in subparagraph c, Enterprise
         shall pay one half (1/2) of the Key Employee Retention Payments to the
         respective Key Employees within sixty (60) days following the first
         anniversary of the Merger Agreement Date.

                           b. Not later than the first business day following
         the Earned Date, Exelon Corporation shall pay the remaining amount of
         the Key Employee Retention Payments to the respective Qualifying Key
         Employees.



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                           c. All Key Employee Retention Payments with respect
         to retention awards made on or after March 31, 2006 shall be made not
         later than the first business day following the Earned Date.

                  5. PAYMENT CONDITIONED ON EXECUTION OF MERGER AGREEMENT.

                           a. Key Employee Retention Payments shall be made if
and only if the Merger Agreement is executed by authorized representatives of
Exelon Corporation and Enterprise. In the event that the Merger Agreement is
not executed, the Program shall be null and void ab initio, all payments
authorized by the Committee under the Program shall immediately be cancelled,
and no Key Employee shall have any rights or entitlements under the Program.

                           b. In the event that the Merger Agreement terminates
for any reason, the Program shall immediately terminate, all remaining payments
authorized by the Committee under the Program shall immediately be cancelled,
and no Key Employee shall have any rights or entitlements to further amounts
under the Program.

                  6. TERMINATION OF EMPLOYMENT. A Key Employee who incurs a
termination of employment prior to the first anniversary of the Merger Agreement
Date shall not be entitled to receive a Key Employee Retention Payment. A Key
Employee who incurs a termination of employment prior to the Earned Date shall
not be eligible to receive the portion of the Key Employee Retention Payment
that is paid after such date, provided that any Key Employee whose employment is
involuntarily terminated without Cause as of or prior to the Effective Time
shall be deemed to have remained employed through the Earned Date and shall be
treated as a Qualifying Key Employee for all purposes.

                  7. ADMINISTRATION. The Program shall be administered by the
Committee (or any successor thereto) consistent with the purpose and terms of
the Program. The Committee (and any successor thereto) shall have full power and
authority to interpret the Program, to select the employees eligible to
participate, to determine the amount of Key Employee Retention Payments, and to
make any other determinations and to take such other actions as it deems
necessary or advisable in carrying out its duties under the Program, including
the delegation of such authority or power, where appropriate. All decisions and
determinations by the Committee (or any successor thereto) shall be final,
conclusive and binding on Enterprise, Exelon Corporation, all employees and any
other persons having or claiming an interest hereunder.

                  8. AMENDMENT AND TERMINATION.

                           a. The Program may be amended by the Committee at any
time; provided that no amendment shall cause any Key Employee not to be covered
under the Program, reduce the amount of any Key Employee Retention Payment, or
in any other manner adversely affect the rights of any Key Employee to a Key
Employee Retention Payment. Notwithstanding the foregoing, if the Key Employee
Retention Payments are deemed to be "deferred compensation" subject to Section
409A of the Internal Revenue Code of 1986, as amended, the




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Program shall be deemed to be amended as necessary to conform such payments to
the requirements of Section 409A.

                           b. The Key Employee Retention Program shall terminate
when the total amount of all Key Employee Retention Payments have been paid to
the respective Key Employees or their beneficiaries.

                  9.       MISCELLANEOUS.

                           a. Benefits provided under the Program shall be in
         addition to any increased payments or accelerated vesting available
         under any other employee benefit plan, program or arrangement,
         including an individual employment agreement.

                           b. No Key Employee Retention Payment shall be taken
         into consideration for the calculation of any pension, severance or
         other benefit under any employee benefit plan, program or arrangement.

                           c. The right of a Key Employee to receive a Key
         Employee Retention Payment shall not be deemed a right to continued
         employment prior to, on or after the Effective Time or the Earned Date,
         and shall not entitle the Key Employee to additional retention payments
         under any other retention program implemented by Enterprise or Exelon
         Corporation.

                           d. No person shall have the power or right to
         transfer (other than by will or the laws of descent and distribution),
         alienate or otherwise encumber such person's interest under the Key
         Employee Retention Program. The provisions of the Program shall inure
         to the benefit of each Key Employee and the Key Employee's
         beneficiaries, heirs, executors, administrators and successors in
         interest.

                           e. Enterprise and Exelon Corporation may make such
         provisions and take such action as they may deem necessary or
         appropriate for the withholding of any taxes that Enterprise or Exelon
         Corporation believe to be required by any law or regulation of any
         governmental authority, whether Federal, state or local, to withhold in
         connection with any Key Employee Retention Payment.

                           f. Key Employee Retention Payments shall not, in the
         aggregate, exceed $15,000,000. The cost of the first installment of Key
         Employee Retention Payments shall be borne by Enterprise. All remaining
         costs and expenses of the program shall be borne by Exelon Corporation.

                           g. Following the Effective Time, the Program shall be
         binding on Exelon Corporation to the same extent as if Exelon
         Corporation had expressly assumed the Program.

                           k. The Program and all determinations made and
         actions taken under the Program shall be governed by the laws of New
         York (excluding the choice of law provisions thereof).




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                           l. If any provision of the Program is held unlawful
         or otherwise invalid or unenforceable, in whole or in part, the
         unlawfulness, invalidity or unenforceability shall not affect any other
         parts of the Program, which parts shall remain in full force and
         effect.







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