The terms of office of the members of the commission shall be six years. Members in office shall continue as members until their respective terms expire on the fourth day of June, one thousand nine hundred sixty-nine and one thousand nine hundred seventy-two. On the expiration of these terms and every three years thereafter appointments shall be made for six-year terms. Appointments to fill vacancies shall be for the unexpired term.
W. Va. Code § 3-1A-3