The City of Yuma shall exercise any of its powers or perform any of its functions and participate in the financing thereof, jointly or in cooperation by contract, or otherwise, with any one or more states, political subdivisions, school districts, Indian tribe or council, the County of Yuma, or any board, commission or agency or combination of them or with the United States or any department or agency thereof. (Gen. Elec. 12/6/77; Gen. Elec. 11/6/01)