Mich. Comp. Laws § 339.1218

Sec. 1218. (1) The department shall regularly inspect each cosmetology establishment and school of cosmetology to determine whether the licensee is conforming to this article and the rules promulgated under this article. (2) A representative of the department may enter and inspect, during regular business hours, a cosmetology establishment or school of cosmetology for purposes of subsection (1). (3) A representative of the department, when inspecting a cosmetology establishment or school of cosmetology, may require an individual who is working in the establishment or school to present identification in order to substantiate his or her identity as the holder of a posted license.