Notwithstanding the foregoing, during each of the first three plan years (April first to March thirty-first) in which such member has established membership in the New York state and local employees' retirement system, such member shall contribute a percentage of annual wages in accordance with the preceding schedule based upon a projection of annual wages provided by the employer. Notwithstanding the foregoing, when determining the rate at which each such member who became a member of the New York state and local employees' retirement system on or after April first, two thousand twelve shall contribute for any plan year (April first to March thirty-first) between April first, two thousand twenty-two and April first, two thousand twenty-six, such rate shall be determined by reference to employees annual base wages of such member in the second plan year (April first to March thirty-first) preceding such current plan year. Base wages shall include regular pay, shift differential pay, location pay, and any increased hiring rate pay, but shall not include any overtime payments.
The head of each retirement system shall promulgate such regulations as may be necessary and appropriate with respect to the deduction of such contribution from members' wages and for the maintenance of any special fund or funds with respect to amounts so contributed.
N.Y. Retire. and Soc. Sec. Law § 517