N.J. Stat. § 18A:13-36
Except as otherwise provided in section 1 of P.L. 2017, c. 45(C.18A:13-34a), the executive county superintendent or executive county superintendents of any county or counties, in which such newly created regional district is situate, shall calculate and apportion the membership of the board of education of such newly created regional district in accordance with the provisions of N.J.S. 18A:13-8 and if such regional district is an all purpose regional district such membership shall be apportioned among the municipalities included within the districts according to the number of their inhabitants, as apportionment is made among constituent districts forming a limited purpose regional district, and the members shall be elected or appointed in accordance with such apportionment.
N.J.S. § 18A:13-36