Michigan Compiled Laws, Chapter 486. Water and Power Companies § 486.505

Sec. 5. As soon as any such ordinance becomes effective the township board may authorize the execution of any such contract as is herein contemplated on behalf of the township by any 2 or more of its officers, and when such contract has been properly executed by such corporation the same shall constitute a binding agreement and obligation on the part of the township and upon the part of the said corporation.