N.J. Stat. § 44:1-43

In the event of the adoption by a majority of the legal voters qualified to vote on the proposition in each such county, or in such counties as shall so elect if the resolutions so provide, there shall be constituted and appointed at a joint meeting of the respective boards of chosen freeholders concerned therein a district welfare board of five persons, citizens of the district, two of whom shall be women, who with the directors of the respective boards of chosen freeholders shall constitute the managers of the district welfare-house. The members shall be elected, as nearly as may be, so as to make the quota in membership in the board equal in representation from the counties concerned. They shall hold office for five years, except that the first appointments shall be for one, two, three, four and five years, respectively, which terms as to duration shall be in the order of the appointments as made and indicated. Vacancies shall be filled for the unexpired term only. The holding of any other office by a member shall not be construed to be the holding of an incompatible office.