Chapter 382 of the Laws of 1973, chapter 890 of the Laws of 1976 and chapter 414 of the Laws of 1983 imposed certain limitations upon the retirement benefits which are available to persons who join or rejoin the New York State and Local Employees' Retirement System or the New York State and Local Police and Fire Retirement System on or after July 1, 1973. One such limitation concerns the method whereby such members will receive service credit for other than full-time public service. The provisions of subdivision (e) of section 446, subdivision (d) of section 513 and subdivision (e) of section 609 of the Retirement and Social Security Law permit the State Comptroller to adopt rules and regulations, interpreting the provisions of sections 446, 513 and 609, which are consistent with the intent thereof.