Mich. Comp. Laws § 259.126

Sec. 126. Every political subdivision in this state is hereby authorized through its governing body to acquire property, real and personal, for the purpose of establishing, constructing, and enlarging airports, landing fields and other aeronautical facilities, and to acquire, establish, construct, enlarge, improve, maintain, equip, operate and regulate such airports, landing fields and other aeronautical facilities, and other property incidental to their operation, either within or without the territorial limits of such political subdivision, and within or without the state of Michigan, in the manner provided by the laws of this state for the acquisition of real property for public purposes. Acquisition may be by purchase, lease, gift, condemnation or dedication: Provided, That, except with respect to the enlargement of existing airports, landing fields and other aeronautical facilities, a verdict of necessity in any condemnation case pending on the effective date of this act, or hereafter instituted pursuant to the provisions of this section, shall not be rendered by the condemnation jury, in case the proposed site is wholly or partially located within a charter township of more than 35,000 population according to the latest census or is wholly or partially located within a political subdivision next adjoining such charter township and the proposed site is located in a county other than that in which the condemning authority is situated, until such time as evidence is presented to the court showing that the board of supervisors of the county within which the proposed site is wholly or partially located and the board of supervisors of the county within which the adjoining political subdivision is located have approved the acquisition and condemnation of such property for such purposes by a majority vote of its members elect.