Mich. Comp. Laws § 331.605

Sec. 5. The membership and the terms of office of said commission shall be established at the discretion of the local legislative body. The number of commissioners, however, shall not exceed 9. The terms of office shall be alternated in such a manner that they do not expire at the same time. The members of the commission shall be appointed by the mayor or the village president. The commissioners shall serve without compensation. Any vacancies in office shall be filled by the mayor or the village president for the remainder of the unexpired term.