Mich. Comp. Laws § 324.61509
The supervisor may compel by subpoena the attendance of witnesses and the production of books, papers, records, or articles necessary in any proceeding before the supervisor or the commission. A person shall not be excused from obeying a subpoena issued in a hearing or proceeding brought under this part on the ground or for the reason that the testimony or evidence, documentary or otherwise, may tend to incriminate or subject that person to a penalty or forfeiture. However, this section does not require a person to produce books, papers, or records or to testify in response to any inquiry that is not pertinent to a question lawfully before the supervisor, commission, or court for determination under this part. Incriminating evidence, documentary or otherwise, shall not be used against a witness who testifies as required in this section in a prosecution or action for forfeiture. A person who testifies as required in this section is not exempt from prosecution and punishment for perjury in so testifying.
MCL 324.61509