§ 911. Benefit enhancements. a. 1. An eligible member other than a member of the New York city teachers' retirement system (i) with a date of membership in a retirement system prior to July twenty-seventh, nineteen hundred seventy-six and (ii) who was in active service on June first, two thousand and continued in active service until October first, two thousand, shall receive one-twelfth of a year of additional retirement credit for each year of retirement credit for service rendered as of the date of retirement, vesting, transfer or death, if applicable, up to a maximum of two years of retirement credit. Such additional credit shall be available for all purposes, including fulfilling the qualifying service requirements of Plans A and C, if applicable. 2. An eligible member who is a member of the New York city teachers' retirement system (i) with a date of membership prior to July twenty-seventh, nineteen hundred seventy-six and (ii) who was in active service on October first, two thousand and (A) continued in active service up to and including June thirtieth, two thousand one, shall receive one-twelfth of a year of additional retirement credit for each year of retirement credit for service rendered as of the date of retirement, vesting, transfer or death, if applicable, up to a maximum of one year of retirement credit or (B) continued in active service up to and including June thirtieth, two thousand two, shall receive one-twelfth of a year of additional retirement credit for each year of retirement credit for service rendered as of the date of retirement, vesting, transfer or death, if applicable, up to a maximum of two years of retirement credit. No eligible member shall receive more than two years of retirement credit pursuant to this section. Such additional credit shall be available for all purposes, including fulfilling the qualifying service requirements of Plan A or C, if applicable. 3. Notwithstanding any other provisions of law, if the service retirement benefit of an eligible member is subject to a maximum retirement benefit, including any limitation imposed by section four hundred forty-four of this chapter, the additional benefit authorized by this subdivision shall be computed by multiplying the pensionable salary base times the number of years of service credit granted by this subdivision times the benefit fraction of the plan under which the employee retires. b. 1. Subject to the provisions of paragraph one-a of this subdivision, and except as provided in paragraph one-b of this subdivision, an eligible member (i) with a date of membership in a retirement system on or after July twenty-seventh, nineteen hundred seventy-six and (ii) who has ten or more years of membership or ten or more years of credited service with a retirement system under the provisions of article fourteen or fifteen of this chapter shall not be required to contribute to a retirement system pursuant to section five hundred seventeen or six hundred thirteen of this chapter as of the cessation date. 1-a. Notwithstanding the provisions of paragraph one of this subdivision or any other provision of law to the contrary, and except as provided in paragraph one-b of this subdivision, a member of the New York city teachers' retirement system or the New York city board of education retirement system:

(i) who is a twenty-seven year participant in the age fifty-five retirement program (as defined in paragraph twelve of subdivision a of section six hundred four-i of this chapter), and

(ii) who becomes subject to the provisions of article fifteen of this chapter after the effective date of this paragraph, shall contribute to a retirement system pursuant to section six hundred thirteen of this chapter until he or she has completed twenty-seven years of credited service. 1-b. The provisions of this subdivision shall not apply to a New York city uniformed correction/sanitation revised plan member (as defined in subdivision twenty-five of section five hundred one of this chapter), an investigator revised plan member (as defined in subdivision twenty-seven of section five hundred one of this chapter) or a New York city revised plan member (as defined in subdivision m of section six hundred one of this chapter). 2. No contribution made to a retirement system by an eligible member prior to the eligible member's cessation date shall be refunded, except as otherwise allowable pursuant to article fourteen or fifteen of this chapter. 3. Nothing in this subdivision b shall affect the obligation of an eligible member to repay any contributions previously refunded pursuant to article fourteen, fifteen or fifteen-D of this chapter in the event such person rejoins a retirement system. Nothing in this subdivision shall affect the obligation of an eligible member to pay such amounts as may be required by section five hundred seventeen, six hundred nine or six hundred thirteen of this chapter or by any other provision of law for service rendered prior to such member's date of membership at a time such member was not a member of a retirement system.