Mich. Comp. Laws § 450.186

Sec. 186. Same; Sunday school or religious societies. Any 3 or more persons may incorporate a Sunday school society, or other special religious society or union, not being a church, but having for its object the teaching of religious principles, or the associating together for religious work. The incorporators shall subscribe articles similar to those prescribed for non-profit corporations generally, which articles shall also contain any special conditions or distinguishing principles upon which such corporation is founded, and, if connected with some organized church, the name of the church and a statement of the extent to which such church may exercise superintendence over the affairs of or discipline of the members of such Sunday school or other corporation. The corporations referred to in this section as Sunday schools or special religious societies, shall have all the rights, privileges, immunities and powers granted by this act to non-profit corporations generally in their secular affairs; and in their religious affairs they shall be governed solely by their articles and by-laws, and the system of discipline therein adopted.