Mich. Comp. Laws § 290.671

Sec. 21. (1) Except as otherwise provided in subsection (2), all marketing programs established under this act shall be resubmitted to a referendum of the producers during each fifth year of operation. (2) A producer referendum under subsection (1) is not required for a marketing program if all the following circumstances exist: (a) The agricultural commodity or agricultural commodity input subject to the marketing program is involved in a commodity checkoff program established pursuant to federal law. (b) The federal commodity checkoff program involving the agricultural commodity provides for a mechanism for a producer referendum. (c) The marketing program involving the agricultural commodity or agricultural commodity input is entirely financed by that federal commodity checkoff program. (3) If the federal commodity checkoff is suspended or terminated, a marketing program established under this act shall conduct a referendum of the producers within 18 months after the suspension or termination.