Michigan Compiled Laws, Chapter 600. Revised Judicature Act of 1961 § 600.1420

Sec. 1420. The sittings of every court within this state shall be public except that a court may, for good cause shown, exclude from the courtroom other witnesses in the case when they are not testifying and may, in actions involving scandal or immorality, exclude all minors from the courtroom unless the minor is a party or witness. This section shall not apply to cases involving national security.