New Jersey Statutes Title 40A. Municipalities and Counties 40A § 16-5

a. If the vacancy occurs any time subsequent to September 1 of the next-to-the last year and up to the expiration of the term of the officer whose office has become vacant, the office may be filled for its unexpired term by appointment by the governing body as hereinafter provided;

b. If the vacancy occurs at any other time, the vacancy shall be filled for its unexpired term at the next general election to be held not less than 60 days after the occurrence of the vacancy. The governing body may fill the vacancy temporarily by appointment as hereinafter provided.