N.J. Stat. § 18A:66-113
A member of the pension fund who has 10 years of service credit in the pension fund and who separates voluntarily or involuntarily before attaining the age of 60 years, and not by removal for cause on charges of misconduct or delinquency, may elect to receive a deferred retirement allowance beginning at the age of 60 years, equal to one-forty-fifth of the average annual compensation received by him during any three years of creditable service providing the largest possible benefit multiplied by the number of years of credited service, with optional privileges as provided for in subsection d. of section 18A:66-110.
Such member shall advise the board of trustees of his election of such a deferred retirement allowance in writing, and shall complete such forms as shall be specified by the board of trustees in its administration of this section.
Subsequent to making such an election, but prior to attaining age 60, a member may later elect to withdraw all payments which he has made to the pension fund together with simple interest at the rate of 4% per annum figured on such employee contributions. Upon such withdrawal of contributions, no further benefits shall be payable on behalf of said employee by the pension fund. If such a member should die before attaining the age of 60 years, all payments which he has made, together with simple interest at the rate of 4% per annum figured on such employee's contributions to the fund from the date of membership, shall be paid to such person, if living, as he shall have nominated by written designation duly executed and filed with the board of trustees, otherwise to the executor or administrator of the member's estate.
Any member who, having elected to receive a deferred retirement allowance, again becomes an employee covered by the retirement system while under the age of 60 shall thereupon be reenrolled. He shall be credited with all service as a member standing to his credit at the time of his election to receive a deferred retirement allowance.
N.J.S. § 18A:66-113