Sections 446, 513 and 609 of the Retirement and Social Security Law were amended by chapters 616 and 713, respectively, of the Laws of 1986 to provide that teachers, as defined in section 136 of the Civil Service Law and section 3101 of the Education Law, shall receive one year of service credit if they have been (employed full-time for the school year. Chapter 616 applies to school years which begin on or after January 1, 1986. Chapter 713 is applicable to school years which begin on or after September 1, 1986. These amendments authorize the Comptroller to promulgate regulations defining school year for the purposes of determining service credit pursuant to sections 446, 513 and 609 of the Retirement and Social Security Law.