Benefits upon withdrawal and death shall be payable as follows:
The term "compensation", as used in this subparagraph, shall mean (1) in the case of a member who has credit for one or more years of service rendered since last becoming a member, the compensation earned by such member during his last twelve months of service, and (2) in the case of a member who has credit for less than one year of service rendered since last becoming a member, it shall mean his annual rate of compensation at the time of his death. The provisions of this paragraph shall apply only to deaths occurring after June thirtieth, nineteen hundred seventy and before July first, nineteen hundred seventy-five. The additional death benefits payable hereunder shall be construed as being payable under paragraph two of this subdivision for the purpose of computing benefits payable under paragraph three of this subdivision.
N.Y. Educ. Law § 512