Mich. Comp. Laws § 123.31

Sec. 1. The owner or owners of any area of farm land consisting of 1 or more tracts, lying within the corporate limits of any city or village, may have the same disconnected from such city or village under the provisions of this act if such area of land (1) Contains 10 or more acres; (2) Is not subdivided into city or village lots and blocks; (3) Is located on the border or boundary of the city or village: Provided, however, That such disconnection shall not result in the isolation of any part of the said city or village from the remainder of such city or village; (4) Shall have been for a period of 3 years next preceding the filing of the petition provided for in section 2 hereof, used for agricultural purposes only.