Michigan Compiled Laws, Chapter 213. Condemnation § 213.179

Sec. 9. In cases where a minor or an insane or incompetent person has an interest in such property, service of a copy of the order shall be made upon the guardian, if any, and if such person has no guardian, the board or commissioner may petition the court for the appointment of a guardian ad litem. Upon the filing of such petition the court shall appoint a guardian ad litem, who shall be a resident of the county and upon whom service of a copy of the said order shall be made.