EXHIBIT 10-21 NEW YORK STATE ELECTRIC & GAS CORPORATION SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN (Includes amendments through Amendment No. 11 as last adopted by Board of Directors on February 9, 1996) SUPPLEMENTAL EXECUTIVE RETIREMENT PLAN 1. Establishment of the Plan and Effective Date. New York State Electric & Gas Corporation (hereinafter called the "Corporation") has established a Supplemental Executive Retire- ment Plan (hereinafter called the "Plan"). The Corporation is the Plan Sponsor. The purpose of the Plan is to increase retirement benefits for salaried employees beyond those currently provided for in the Corporation's tax qualified Retirement Benefit Plan for Employees. The Plan is effective as of September 7, 1984 and will continue in effect unless terminated or modified by the Corporation. 2. Plan Administrator. The Plan Administrator is the Corporation. 3. Provisions Applicable to All Salaried Employees Concerning Pension Benefits. All employees of the Corporation, other than ones included in a unit of employees covered by a collective bargaining agreement, shall receive the amount of benefits specified under the Corporation's tax qualified Retirement Benefit Plan for Employees (i) without regard to any limitations imposed on these pension benefits by any provision of the Internal Revenue Code of 1954, as amended, and the regulations thereunder, whether now existing or as may hereafter be adopted and (ii) by including as "Basic Compensation" for purposes of said plan any amounts of the salaried employee's compensation that would constitute "Basic Compensation" under said plan but for the salaried employee's election to defer such amount pursuant to the Corporation's Deferred Compensation Plan for Salaried Employees (hereinafter called the "Deferred Compensation Plan"). Payment of this benefit shall be made in the same form as elected by the salaried employee under the Retirement Benefit Plan for Employees. The benefit payable pursuant to this Paragraph 3 shall be calculated by subtracting the sum of (i) the benefit payable under the Corporation's Retirement Benefit Plan for Employees and (ii) any benefit payable pursuant to Section 7 of a Deferred Compensation Agreement executed pursuant to the Deferred Compensation Plan in order to defer part of the salaried employee's compensation (other than awards pursuant to the Corporation's Annual Executive Incentive Plan, or its predecessor plan, the Annual Executive Incentive Compensation Plan) from the benefit described in the first sentence of this Paragraph 3. 4. Provisions Applicable to Certain Key Persons Concerning Pension Benefits. A. Determination of Benefit. In addition to the benefits provided pursuant to Paragraph 3 hereof, all Key Persons who retire either voluntarily or by reason of a disability at age 60 (or age 55 in the case of a Participant in the Corporation's tax qualified Retirement Benefit Plan for Employees who is described in Section 2 of Article XI of said plan) or later shall be entitled to receive a total retirement benefit equivalent to the percentage of the average of such Key Person's highest three years of earnings within the last ten years of employment with the Corporation that is determined as follows: (i) the percentage benefit shall be 45% for each Key Person who has ten years of service; (ii) the percentage amount shall be increased by one percentage point per year for each additional full year of Service up to a maximum of 75% for forty or more years of service. For the purpose of determining the earnings of a Key Person who is a participant in the Corporation's Annual Executive Incentive Plan or Long Term Executive Incentive Share Plan, (or their respective predecessor plans, the Annual Executive Incentive Compensation Plan and the Performance Share Plan), there shall be excluded any amounts received pursuant to such plans. Additionally, upon and after a Change in Control (as defined in Paragraph 7 hereof), all Key Persons whose employment is terminated at age 55 or later for any reason other than death or Cause (as defined in Paragraph 7 hereof) shall be entitled to receive the retirement benefit described in this Paragraph 4A, as well as any benefits provided pursuant to the terms of Paragraph 3 hereof. For purposes of the benefits payable pursuant to the immediately preceding sentence, the benefit calculated under Paragraph 4A hereof shall be determined by applying the same reduction in benefits for commencement prior to age 60 as is applied upon early retirement under the Corporation's Retirement Benefit Plan for Employees. From the amount determined in accordance with the provisions of this paragraph there shall be subtracted (i) any amounts received by the Key Person pursuant to Paragraph 3 hereof or from the Company's tax qualified Retirement Benefit Plan for Employees (prior to reduction for the survivor's benefit or ten year certain benefit) and (ii) any social security benefits which the Key Person is eligible or expected to become eligible to receive as determined by the Plan Administrator. If after the subtraction there remains a positive amount, that amount shall be paid by the Corporation as an additional benefit to the Key Person in accordance with the terms of this Plan. For purposes of making the subtraction set forth in the immediately preceding paragraph, if (i) a Key Person retires at or after age 60 (or age 55 in the case of a Participant in the Corporation's tax qualified Retirement Benefit Plan for Employees who is described in Section 2 of Article XI of said plan) and prior to age 62, or (ii) a Key Person's employment is terminated, upon and after a Change in Control (as defined in Paragraph 7 hereof), for any reason other than death or Cause (as defined in Paragraph 7 hereof) at or after age 55 and prior to age 62, the amount of social security benefits subtracted will be the amount of estimated social security benefits that the Plan Administrator estimates that the Key Person would have received if he had retired at age 62. B. Survivor's Benefit. One-half of any amount being paid to a key person pursuant to Paragraph 4A hereof after retirement will be paid to the surviving spouse of the Key Person during the spouse's lifetime upon the death of the Key Person after retirement. If a Key Person dies prior to retirement and such Key Person would have been entitled to payments pursuant to Paragraph 4A hereof if, at the time of his death, he had retired rather than died, his spouse shall be paid during her lifetime the amount specified in the next sentence of this Paragraph 4B. Said amount shall be determined by applying the first sentence of this Paragraph 4B as if the Key Person had retired on the date of his death, rather than dying on such date, and survived long enough to receive the first payment due to him pursuant to Paragraph 4A hereof. C. Payment of Benefit. Benefits payable under Paragraph 4A of this Plan shall be payable monthly to the Key Person. All benefits payable pursuant to Paragraphs 4A and 4B of this Plan will cease upon the death of the surviving spouse of the Key Person or, if there is no surviving spouse, upon the death of the Key Person. No rights shall accrue under this paragraph to (i) the estate of the Key Person, (ii) any beneficiary of the Key Person other than a surviving spouse or (iii) the estate of the surviving spouse. Except as specifically provided in the last two sentences of the first paragraph of Paragraph 4A hereof or in the second and third sentences of Paragraph 4B hereof, no benefits will be paid to the Key Person or any surviving spouse pursuant to this plan if the Key Person dies prior to retirement or the employment of the Key Person is terminated by the Corporation. D. Definition of Key Person. For purposes of this Plan, the term "Key Person" means a person who has at least 10 years of service and either (i) who, for at least 5 years, either had been an officer of the Corporation or had a salary grade level of at least 18, or (ii) who was, on December 31, 1990, a member of the Executive Staff of the Corporation and who first became a member of the Executive Staff of the Corporation at least 5 years prior to his retirement. 5. Other Provisions. The Corporation reserves the right to terminate or modify the Plan in whole or in part at any time by action of the Board of Directors of the Corporation. Any such termination or modification shall not affect rights previously accrued. Participation in the Plan shall not be deemed to be an employment contract. A participant's rights and benefits under the Plan may not be assigned, pledged, or encumbered by the participant, his estate or beneficiary. The Plan Administrator will make such decisions, rules and regulations as are necessary to administer the Plan and interpret the provisions of the Plan. 6. Funding. There will be no funding of any amounts to be paid pursuant to this Plan; provided, however, that the Corporation, in its discretion, may establish a trust to pay such amounts, which trust shall be subject to the claims of the Corporation's creditors in the event of the Corporation's bankruptcy or insolvency; and provided, further, that the Corporation shall remain responsible for the payment of any such amounts which are not so paid by any such trust. 7. Definitions of Cause and Change in Control. "Cause" for termination by the Corporation of a Key Person's employment (for purposes of this Plan), after any Change in Control, shall mean (i) the willful and continued failure by the Key Person to substantially perform the Key Person's duties with the Corporation (other than any such failure resulting from the Key Person's incapacity due to physical or mental illness) after a written demand for substantial performance is delivered to the Key Person by the Board of Directors, which demand specifically identifies the manner in which the Board of Directors believes that the Key Person has not substantially performed the Key Person's duties, or (ii) the willful engaging by the Key Person in conduct which is demonstrably and materially injurious to the Corporation or its subsidiaries, monetarily or otherwise. For purposes of clauses (i) and (ii) of this definition, no act, or failure to act, on the Key Person's part shall be deemed "willful" unless done, or omitted to be done, by the Key Person not in good faith and without reasonable belief that the Key Person's act, or failure to act, was in the best interest of the Corporation. A "Change in Control" shall be deemed to have occurred if the conditions set forth in any one of the following paragraphs shall have been satisfied: (i) any Person (as defined in this Paragraph 7) is or becomes the Beneficial Owner (as defined in this Paragraph 7), directly or indirectly, of securities of the Corporation (not including in the securities beneficially owned by such Person any securities acquired directly from the Corporation or its affiliates) representing 25% or more of the combined voting power of the Corporation's then outstanding securities; or (ii) during any period of two consecutive years (not including any period prior to January 7, 1994), individuals who at the beginning of such period constitute the Board of Directors and any new director (other than a director designated by a Person who has entered into an agreement with the Corporation to effect a transaction described in paragraph (i), (iii) or (iv) of this Change in Control definition) whose election by the Board of Directors or nomination for election by the Corporation's stockholders was approved by a vote of at least two-thirds (2/3) of the directors then still in office who either were directors at the beginning of the period or whose election or nomination for election was previously so approved, cease for any reason to constitute a majority thereof; or (iii) the shareholders of the Corporation approve a merger or consolidation of the Corporation with any other corporation, other than (x) a merger or consolidation which would result in the voting securities of the Corporation outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity), in combination with the ownership of any trustee or other fiduciary holding securities under an employee benefit plan of the Corporation, at least 75% of the combined voting power of the voting securities of the Corporation or such surviving entity outstanding immediately after such merger or consolidation or (y) a merger or consolidation effected to implement a recapitalization of the Corporation (or similar transaction) in which no Person acquires more than 50% of the combined voting power of the Corporation's then outstanding securities; or (iv) the shareholders of the Corporation approve a plan of complete liquidation of the Corporation or an agreement for the sale or disposition by the Corporation of all or substantially all the Corporation's assets. For purposes of the definition of Change in Control in this Paragraph 7: "Beneficial Owner" shall have the meaning defined in Rule 13d-3 under the Exchange Act. "Exchange Act" shall mean the Securities Exchange Act of 1934, as amended from time to time. "Person" shall have the meaning given in Section 3(a) (9) of the Exchange Act, as modified and used in Sections 13(d) and 14(d) thereof; however, a Person shall not include (i) the Corporation or any of its subsidiaries, (ii) a trustee or other fiduciary holding securities under any employee benefit plan of the Corporation or any of its subsidiaries, (iii) an underwriter temporarily holding securities pursuant to an offering of such securities, or (iv) a corporation owned, directly or indirectly, by the stockholders of the Corporation in substantially the same proportions as their ownership of stock of the Corporation.