Mich. Comp. Laws § 493.65: Subpoena of witnesses and evidence; oaths and affirmations; certain conduct as misdemeanor.

Sec. 15.

The commissioner may subpoena witnesses and documents, papers, books, records, and other evidence, in any matter over which the commissioner has jurisdiction, control, or supervision. The commissioner may administer oaths and affirmations to a person whose testimony is required.

A person subpoenaed under this section who willfully refuses or neglects to appear at the time and place named in the subpoena, or to produce books, accounts, records, files, or documents required by the commissioner, or who refuses to be sworn or, unless permitted by law, refuses to answer as a witness, is guilty of a misdemeanor.