N.J. Stat. Ann. § 43:13-21

Any municipal employee applying for membership after July first, one thousand nine hundred and twenty-nine, in the pension fund created in such city under this article shall pass a physical examination satisfactory to and conducted by a physician designated by the pension commission. At the time of his application for membership and the benefits of this article and before being admitted to membership and the benefits of this article, the applicant shall produce a certificate of good health signed by this physician.