Mich. Comp. Laws § 123.863

Sec. 3. Any such village, township or city, having previously adopted the provisions of this act, may at any time thereafter relinquish said authority or power by following the same procedure as provided in this act for adopting the provisions thereof: Provided, That such action may be taken by the legislative body aforesaid only after a petition signed by 10 per centum of the qualified voters residing in such village, township or city, as the case may be, duly filed with the legislative body thereof at least 60 days prior to the date of re-submission, asking that the question of relinquishment of said authority be re-submitted to the vote of the people.