N.J. Stat. Ann. § 26:3-6

The members of the local board in every municipality, other than a township, which is subject to the provisions of subdivision C of this article, or a board established by a municipality that invokes the provisions of subsection b. of R.S.26:3-3, shall serve for such term as the governing body may by ordinance provide, but, except in a city having a population of over 80,000 but not of the first class, no term shall exceed 4 years, and in a city of the first class the term shall be 3 years. The terms shall be so arranged that the terms of not more than three members shall expire in any 1 year, except that in a city of the first class the terms of three members shall expire in 1 year, the terms of an additional three members in the next succeeding year, and the terms of the remaining members in the second succeeding year.