An employee not already a member of the New York State Employees' Retirement System, appointed either provisionally, as authorized in section 65 of the Civil Service Law, or on a temporary basis as authorized in section 64 of the Civil Service Law, to a position in the classified service of civil service, need not become a member of the retirement system.
N.Y. Comp. Codes R. & Regs. Tit. 2 § 302.1