N.J. Stat. § 40A:9-9
In addition to the officers and employees whose appointment is specifically provided for by law, the board of chosen freeholders of the county or the governing body of the municipality, as the case may be, may appoint or provide for the appointment of such other officers, agents and employees as may be required for the execution of the powers conferred upon said board or governing body or any board or officer of the county or municipality.
Whenever any officer or employee is temporarily absent, disabled or disqualified, the board of chosen freeholders of the county or the governing body of the municipality may designate some person to act in place of any such officer or employee during his temporary absence, disability or disqualification.
N.J.S. § 40A:9-9