Of the members of the commission appointed by the Governor, the first members shall be appointed, 3 for 1 year, 3 for 2 years, 2 for 3 years, and their successors shall be appointed for terms of 3 years. The members so appointed shall hold over until their respective successors are appointed and shall qualify. Vacancies shall be filled for the unexpired terms only.
N.J.S. § 34:16-23