N.J. Stat. § 26:3-10
The local board in every township having a population of more than twenty thousand inhabitants shall be composed of not less than five nor more than seven members who shall be appointed in such manner and hold their respective offices for such terms, not exceeding four years, as the township committee or other governing body may by ordinance provide, but the terms of not more than three members shall expire in any one year, but any such township may by ordinance adopt the provisions of subdivision B of this article and thereafter shall be subject to the provisions thereof and shall not be subject to the provisions of this subdivision of this article. Upon the consent of the prospective appointee, the township committee may appoint a school nurse or the township physician to the local board, notwithstanding that the nurse or physician is not a resident of the township.
N.J.S. § 26:3-10