Mich. Comp. Laws § 41.711

Sec. 1. The township board of a township or the county board of commissioners may operate or join with another municipality or contract with individuals, firms, organizations, or corporations in operating or furnishing an ambulance and inhalator service for the use and benefit of the residents of the township or county. The service by the township or the county may be in connection with fire protection service or as a separate operation.