Any notice filed as prescribed by the aforementioned section (Retirement and Social Security Law, §138-b) requesting a decrease in annuity contributions to the New York State Employees' Retirement System of the amount required to pay the member's contribution for old-age and survivors insurance, as well as any withdrawal thereof, shall be irrevocable for a period of one year from the date of such filing.
N.Y. Comp. Codes R. & Regs. Tit. 2 § 306.1