N.J. Stat. Ann. § 43:18-10

Any employee applying for membership in a corporation created under this chapter and the benefits thereof, must have passed, at the time he entered service, a physical examination satisfactory to and conducted by a physician designated by the board of trustees of the pension fund or shall pass a physical examination satisfactory to and conducted by such a physician at the time of his application for membership in the corporation and the benefits of this chapter. The applicant shall produce a certificate of good health signed by such a physician before being admitted to membership and the benefits of this chapter.