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.
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