N.Y. RSS Law § 31-D

§ 31-d. Participation by the Pioneer Library System. a. The Pioneer\nLibrary System may, by resolution adopted by its board of trustees and\napproved by the comptroller, elect to participate in the retirement\nsystem. Acceptance of its employees for membership in the retirement\nsystem shall be optional with the comptroller, who shall determine the\namounts of contribution payable by such system and its employees, shall\nresolve questions of credit for prior service, and shall in all other\nrespects assure that such employees share the same rights, obligations\nand benefits as other members of the retirement system.\n b. The officers and employees of such system shall be credited with\nsuch periods of prior service as shall be certified by such system for\nservice rendered to it, or the state, or in any other capacity approved\nby such system and the comptroller. Service for such system after the\ndate on which it commences to participate in the retirement system shall\nbe considered as member service. An officer or employee of such system\nwho, as of the date he or she is so approved for membership in the\nretirement system, is already a member thereof, shall not have his or\nher total credit reduced by such approval. Any reserve held on account\nof any such officer or employee in the pension accumulation fund shall\nbe used as an offset against the deficiency contribution payable\nthereafter by such system on account of such officer or employee for any\nprior service credit and any such previous credit.\n