Mich. Comp. Laws § 290.562b

Sec. 12b. (1) The commission may change the method or the amount of the assessment imposed in section 12, or both, by complying with this section. (2) If the commission proposes a change as described in subsection (1), then it shall conduct a referendum of growers relative to any such change. (3) After a referendum, the commission shall implement a proposed change if more than 50% of the growers voting approve any proposed change and those voters represent more than 50% of the hundredweight voting.