State of Wisconsin Statutes
(1) (a) In this section "municipality" means the state or any department or agency thereof, or any city, village, town, county, school district, public library system, public inland lake protection and rehabilitation district, sanitary district, farm drainage district, metropolitan sewerage district, sewer utility district, solid waste management system created under s. 59.70
(b) If the purpose of the intergovernmental cooperation is the establishment of a joint transit commission, "municipality" means any city, village, town or county.
(2) In addition to the provisions of any other statutes specifically authorizing cooperation between municipalities, unless those statutes specifically exclude action under this section, any municipality may contract with other municipalities and with federally recognized Indian tribes and bands in this state, for the receipt or furnishing of services or the joint exercise of any power or duty required or authorized by law. If municipal or tribal parties to a contract have varying powers or duties under the law, each may act under the contract to the extent of its lawful powers and duties. A contract under this subsection may bind the contracting parties for the length of time specified in the contract. This section shall be interpreted liberally in favor of cooperative action between municipalities and between municipalities and Indian tribes and bands in this state.
(1) In this section, "municipality" has the meaning given in s. 66.0301 (1) (a).
(2) A municipality may contract with municipalities of another state for the receipt or furnishing of services or the joint exercise of any power or duty required or authorized by statute to the extent that laws of the other state or of the United States permit the joint exercise.