N.Y. Retire. & Soc. Sec. Law § 214
Notwithstanding any provision of this article, a retired person employed prior to July first, nineteen hundred sixty-four, under the provisions of subdivision f of section one hundred one of the retirement and social security law, or subdivision two of section one hundred fifty of the civil service law, or section one hundred fifty-one of the civil service law, or section 9.13 of the mental hygiene law, or section five hundred eleven-b of the education law, or section B20-48.1 of the administrative code of the city of New York, may be similarly employed during the effective period of this article subject to the same conditions and limitations as were applicable to his employment under the respective provisions under which he was employed prior to July first, nineteen hundred sixty-four.
N.Y. Retire. and Soc. Sec. Law § 214