N.J. Stat. § 43:8B-2: Employees entitled to pension

Any employee who is not a member of and was not required by law at the time of appointment or employment, or at any time thereafter, to become a member of a contributory retirement system, may, at the discretion of his employer, be retired and granted a pension under the provisions of this act. No employee shall receive a pension under this act, if he is eligible to receive a pension for the same employment under any other law of this State.

L.1955, c. 263, p. 981, s. 2.