Mich. Comp. Laws § 750.441: Teaching, soliciting and advocating polygamy; felony.

Sec. 441.

Teaching, soliciting and advocating the practice of polygamy-Any person who shall solicit to a polygamous life, or teach polygamy as a correct form of family life, for the purpose of inducing men and women to enter into the practice of polygamy or advocate the doctrine and practice of polygamy, or attempt to persuade any person by private or public discourse to adopt a polygamous life, shall be guilty of a felony.