Mo. Rev. Stat. § 91.750
Any governing body operating sewage disposal or waterworks as defined in sections 91.620 to 91.770 or which as herein provided has ordered the construction or acquisition of such works (in this section called the owner) is hereby authorized to contract with one or more other cities, towns or political subdivisions within the state (in this section called the lessee), and such lessees are hereby authorized to enter into such contracts with such owners, for the use of such works by such lessee and their inhabitants, but only to the extent of the capacity of the works without impairing the usefulness thereof to the owners, upon such terms and conditions as may be fixed by the boards and approved by ordinances of the respective contracting parties; provided, however, that no such contract shall be made for a period of more than fifteen years or in violation of the provisions of said ordinance authorizing bonds hereunder or in violation of the provisions of said trust indenture. The lessee shall by ordinance have power to establish, change and adjust rates and charges for the service rendered therein by the works against the owners of the premises served, in the manner herein provided for establishing, changing and adjusting rates and charges for the service rendered in the city or town where the works are owned and operated, and such rates or charges shall be collectible and shall be a lien as herein provided for rates and charges made by the owner. The necessary intercepting sewers and appurtenant works for connecting the works of the owner with the sewerage system of the lessee shall be constructed by the owner or the lessee upon such terms and conditions as may be set forth in said contract, and the cost or that part of the cost thereof which is to be borne by the owner may be paid as a part of the cost of the works from the proceeds of bonds issued under sections 91.620 to 91.770 unless otherwise provided by said ordinance or trust indenture prior to the issuance of the bonds. The income received by the owner under any such contract shall, if so provided in said ordinance or trust indenture, be deemed to be a part of the revenues of the works as in sections 91.620 to 91.770 defined and be applied as herein provided for the application of such revenues.
§ 91.750, RSMo