N.J. Stat. Ann. § 4:24-19

The supervisors shall designate a chairman and may, from time to time, change such designation. The term of office of each supervisor shall be at the pleasure of the State committee. The selection of successors shall be made in the same manner in which the retiring supervisor shall have been selected. A majority of the supervisors shall constitute a quorum and the concurrence of a majority in any matter within their duties shall be required for its determination. A supervisor shall be entitled to expenses and a per diem, in an amount to be established by the State committee within the limits of available appropriations, when engaged in the performance of his duties.