N.J. Stat. § 43:13-22.58
Upon the separation from service with the city of any member who is not entitled to receive any other benefits from the system, the contributions, without interest, paid into the fund by such member shall be refunded to him. Said refund of the member's contributions shall be made at the expiration of 90 days following his separation from service, plus the period of time during which any legal proceedings pertaining thereto shall be pending. No such person shall thereafter be eligible for a pension under this act unless upon a re-employment by the city he shall repay to the fund the amount of any such refund made to him. The obligation to refund payments made to the fund shall not apply to an employee suspended or discharged for causes which bar him from eligibility to reappointment under civil service rules.
N.J.S. § 43:13-22.58