N.J. Stat. Ann. § 40:56-23

The officer or members of the board or commissioners charged with the duty of making assessments for benefits under this chapter shall, before the commencement of their duties, be sworn by an officer duly authorized to administer oaths for the faithful performance of such duties. In case of the death or disqualification of such officer or any member or members of such board or commission, the governing body shall appoint some other suitable person or persons to act in his place. Such officer and the members of said board or commission shall receive such compensation for their services as the governing body may fix and determine.