Mich. Comp. Laws § 458.72

Sec. 12. Any Methodist Protestant church society, heretofore incorporated, or the trustees of which have heretofore exercised the powers of a body corporate, may, by a 2/3 vote of its qualified members, place itself under the provisions of this act, the same as if originally incorporated under it, by 2/3 of the qualified members executing articles of association as hereinbefore provided and recording the same as also hereinbefore provided.