Mich. Comp. Laws § 125.4202

Sec. 202. (1) Except as otherwise provided in this subsection, a municipality may establish 1 authority. If, before November 1, 1985, a municipality establishes more than 1 authority, those authorities may continue to exist as separate authorities. Under the conditions described in section 203a, a municipality may have more than 1 authority within that municipality's boundaries. A parcel of property shall not be included in more than 1 authority created by this part. (2) An authority shall be a public body corporate which may sue and be sued in any court of this state. An authority possesses all the powers necessary to carry out the purpose of its incorporation. The enumeration of a power in this part shall not be construed as a limitation upon the general powers of an authority.