N.J. Stat. § 40:37-197: Commissioners; terms; vacancies

Of the commissioners first appointed one shall hold office for one year, one for two years, one for three years, two for four years and two for five years. The term of office of each commissioner first appointed shall be fixed by his order or certificate of appointment. Thereafter all commissioners shall hold office for the full term of five years and vacancies shall be filled by the board of chosen freeholders by appointment for the unexpired term only.