Michigan Compiled Laws, Chapter 324. Natural Resources and Environmental Protection § 324.61731

Sec. 61731. The supervisor may compel by subpoena the attendance of witnesses or the production of books, papers, records, or articles necessary in any proceeding before the supervisor. A person shall not be excused from obeying any subpoena for the reason that the testimony or evidence, documentary or otherwise, may tend to incriminate him or her or subject him or her to a penalty or forfeiture. Nothing in this part shall be construed as requiring any person to produce anything or to testify in response to inquiry not pertinent to some question lawfully before the supervisor or any court for determination within the purposes of this part. Any incriminating evidence, documentary or otherwise, shall not thereafter be used against the witness in a prosecution or action for forfeiture. A person testifying is not exempt from prosecution and punishment for perjury in so testifying.