N.J. Stat. § 43:15A-76
Any employee of any county, municipality or public agency which has adopted or shall hereafter adopt the retirement system as provided in this act, who has entered or shall hereafter enter into the active air, military or naval service of the United States before making application for enrollment in the retirement system, shall be accepted as a member upon his filing application, provided that, if an employee enters such service after January 1, 1955 and after the date upon which this act becomes effective with regard to his employer, such application is made within 3 months after entering such service or within 3 months after the date this act becomes effective with regard to his employer, whichever is later. His regular salary deductions as determined by the retirement system shall be paid to the system by his employer, as provided by chapter 252 of the laws of 1942, as amended by chapter 326 of the laws of 1942. If he entered such service prior to January 2, 1955, and was a contributing member of the State Employees' Retirement System at that time, upon establishing his status as a veteran and contributing to the retirement system for a period of 90 days after his discharge from such service, he shall receive free prior service credit for all public employment prior to January 2, 1955. This provision shall not apply to any employee whose appointment is temporary or seasonal.
In addition to any prior service credit authorized in this act, such member shall be entitled to prior service credit from the date of his induction to the effective date of this section.
N.J.S. § 43:15A-76