BOSTON EDISON COMPANY
SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN
SECTION 1. PURPOSE
The purpose of the Boston Edison Company Supplemental Executive Retirement Plan (the "Plan") is to reward
certain key executive employees of Boston Edison Company (the "Employer") and its subsidiaries through
supplemental retirement payments.
SECTION 2. ADMINISTRATION
The Executive Personnel Committee of the Board of Directors of the Employer (the "EPC") and the Retirement
Committee appointed to administer the Boston Edison Retirement Plan (the "RC") will be responsible under the
Plan for carrying out their respective administrative and other duties as set forth in the Plan. In addition, the EPC
has the full discretionary power and authority to interpret the plan, settle all disputes which may arise in
connection with the Plan, and establish any claims procedures required by the Employee Retirement Income
Security Act of 1974. The decisions, interpretations and determinations made by the EPC or the RC relating to
the Plan will be final and conclusive on all persons.
The Employer agrees to indemnify and to defend to the fullest possible extent permitted by law any member of
the EPC and the RC (including any person who formerly served as a member of the EPC or the RC) against all
liabilities, damages, costs and expenses (including attorneys' fees and amounts paid in settlement of any claims
approved by the Company) occasioned by any act or omission to act in connection with the Plan.
SECTION 3. PARTICIPANTS
Participants in the Plan will be those key executive employees of the Employer and its subsidiaries selected from
time to time by the EPC to participate in plan benefits.
SECTION 4. BENEFITS
(a) Full Benefit. Each Participant who attains his or her Full Benefit Age (as hereinafter defined) while an
employee of the Employer or its subsidiaries may terminate employment on the first day of any month thereafter
and receive an annual benefit calculated as of his or her termination date, exp