Mo. Const. art. VI, § 16. Cooperation by local governments with other governmental units

Any municipality or political subdivision of this state may contract and cooperate with other municipalities or political subdivisions thereof, or with other states or their municipalities or political subdivisions, or with the United States, for the planning, development, construction, acquisition or operation of any public improvement or facility, or for a common service, in the manner provided by law. [Effective - 27 Feb 1945 , see footnote]