Michigan Compiled Laws, Chapter 286. Agricultural Industry § 286.714

Sec. 14. (1) Except as otherwise provided in this section, a local unit of government shall not adopt, maintain, or enforce an ordinance that prohibits or regulates the labeling, sale, storage, transportation, distribution, use, or planting of agricultural seeds, vegetable seeds, flower seeds, turf grass seeds, or forest tree seeds.

(2) A local unit of government may enact an ordinance prescribing standards different from those contained in this act and rules promulgated under this act and that prohibits or regulates the use or planting of agricultural seeds, vegetable seeds, flower seeds, turf grass seeds, or forest tree seeds under either or both of the following circumstances:

(3) An ordinance enacted pursuant to subsection (2) shall not be enforced by a local unit of government until approved by the commission of agriculture. If the commission of agriculture denies an ordinance enacted pursuant to subsection (2), the commission of agriculture shall provide a detailed explanation of the basis of the denial within 30 days.

(4) Within 60 days after submission to the department of agriculture of a resolution of a local unit of government identifying unreasonable adverse effects on the environment or public health under subsection (2), the department of agriculture shall hold a local public meeting to determine the nature and extent of unreasonable adverse effects on the environment or public health. Within 30 days after the local public meeting, the department of agriculture shall issue a detailed opinion regarding the existence of unreasonable adverse effects on the environment or public health as identified by the resolution of the local unit of government.

(5) Section 15  1 does not apply to a violation of this section.

(6) This section does not limit the authority of a local unit of government under 1941 PA 359, MCL 247.61 to 247.72.