Mo. Rev. Stat. § 251.380: Authorized planning units may contract with federal, state, or local governments.

In matters relating to comprehensive planning, a regional planning commission created under sections 251.150 to 251.440, and any planning commission or other organization, public or private, heretofore constituted or designated may enter into a contract and cooperate with any federal, state or local unit including other planning commissions, or organizations, within this or other states under the laws of Missouri.