New Jersey Statutes Title 17B. Insurance 17B § 18-7

a. The certificate of incorporation of any mutual insurer of this State hereafter incorporated may contain provisions for the elections of directors in the manner set forth in sections 17B:18-11 to 17B:18-17, inclusive, and any amendment of the certificate of incorporation or of the charter of any mutual insurance corporation of this State heretofore or hereafter incorporated pursuant to the provisions of any general or special law of this State, may, at the option of such corporation, contain such provisions. Such certificate of incorporation or amendment thereof or of the charter of such insurer may provide that any vacancy in its board of directors may be filled by a majority vote of the board for the unexpired term to which such vacancy relates.

b. The periods at which directors of any such corporation shall be elected, the time of the election, the number of directors to be elected at any one time, and the terms for which they shall respectively be elected may be prescribed by its certificate of incorporation or charter or amendment thereof; provided, however, that one or more directors shall be elected at least once in every 2 years and that no director shall be elected for a term longer than 5 years.