Mich. Comp. Laws § 32.555: Unorganized militia; power of the governor.

Sec. 155.

The governor may order into the defense force any members of the unorganized militia in case of riot, tumult, breach of the peace, resistance of process, or for service in aid of civil authority, whether state or federal, or in time of actual or imminent public danger, disaster, crisis, catastrophe or other public emergency within this state.