Mich. Comp. Laws § 290.758

Sec. 8. (1) A grower or collector shall obtain a ginseng certificate from the director certifying that ginseng harvested or collected in this state that is entering commerce or is being exported from this state was legally harvested or collected. (2) Until a ginseng certificate is obtained, a person shall not do either of the following: (a) Export ginseng harvested or collected in this state. (b) Commingle ginseng harvested or collected in this state with ginseng originating outside this state. (3) Ginseng shall not be certified more than 1 time without written authorization from the director. (4) Ginseng harvested or collected in this state shall not be exported from this state under authority of a certificate issued by another state.