Mich. Comp. Laws § 123.32
The owner or owners of any such area of land who desire such disconnection shall file a petition in the circuit court of the county where the land, or the greater part thereof, is situated, and in such petition shall allege facts in support of such disconnection. The particular city or village shall be made defendant, and it, or any taxpayer resident in such municipality, may appear and defend against such petition. If the court finds that the allegations of the petition are true and that the petitioner has met the qualifications as set forth in section 1 hereof, then such area of land shall be entitled to disconnection under the provisions of this act, and the court shall order said land disconnected from such city or village. In case of the disconnection from a city of any land which previously constituted a part of 1 or more townships, such land shall thereupon attach to and become a part of such township or townships, which shall be specified in the judgment. In case of the disconnection of any other land, the court shall determine and specify in the judgment what township or townships such land shall attach to and become a part of: Provided, however, That if by reason of city or village owned sewers, sidewalks, highways, water mains, gas mains, or other public improvements, upon or abutting said property, it would be inequitable to such city or village to grant said petition, in such case only may the court in its discretion deny the same even though petitioner has met the qualifications set forth in section 1 hereof.
MCL 123.32