New Jersey Statutes Title 43. Pensions and Retirement and Unemployment Compensation 43 § 10-1.1

(1) by payment into the fund, in such manner as shall be determined by the pension commission, of all arrears, with interest, as the pension commission shall determine to be due in order to give such employees the same standing as a member of said fund as all other members who joined said pension fund when the law providing for such fund became effective, in which case the maximum rate of interest shall not exceed the average rate of earnings of the investments of said fund and the maximum length of time for the payment of arrears shall be five years from the date of the application to join the fund, or

(2) upon written application in which case the regular deductions from the salary of such employees shall commence upon the filing of such written application and he shall be entitled to the same benefits as a new employee then joining the fund would receive.