Mich. Comp. Laws § 290.304

Sec. 4. The state commissioner of agriculture shall enforce the provisions of this chapter and the penal statutes relating thereto and the said commissioner, his assistants, experts, chemists, and agents shall have access and ingress to the places of business, stores, buildings and yards used for the sale of naval stores, and may open any package, tank car, tank, drum, barrel, can, jar, tub, or other receptacle containing any article that may be sold, offered for sale, or exposed for sale in violation of such provision or statute. The inspectors, assistants, or chemists, appointed by the state commissioner shall perform like duties and have like authority under this chapter and the penal statutes relating thereto as is provided by law in other cases.