Mich. Comp. Laws § 289.7131: Federally inspected meats; preemption of state ingredient standards.

Sec. 7131.

A person shall not sell or offer for sale a product that is not manufactured to the ingredient standards of this act unless the federal government legally preempts Michigan's ingredient standards. In that case, federally inspected meats not meeting the ingredient requirements of this act shall be identified as federally inspected on intact, sealed packaging from the federally inspected location.