The term of office of each member of the board is four years and until a successor is appointed and qualified. The terms must be so arranged that no more than four terms expire on the thirty-first of July of each year. The governor shall fill all vacancies by appointment. In case of a vacancy before the expiration of a term, the appointment must be for the residue of the term. A member of the board may not serve on the board for more than two successive four-year terms.
N.D.C.C. § 43-62-05