65 ILCS 5/11-136-8
Such commission shall have the right to supply water or sewer facilities to any municipality, political subdivision, private person or corporation, in addition to the municipalities which have formed the commission, upon such payment, terms and conditions as may be mutually agreed upon, provided the water is delivered to such party or parties at the corporate limits of the municipalities which have created such commission or from such water works properties of the commission located outside such municipalities that have been constructed or acquired as necessary and incidental to the furnishing of water to the municipalities which formed the commission.
Such commission shall have the power to contract with any person, corporation or political subdivision or any municipal corporation or other agency for a sewer system or for a supply of water, or to supply water to such person, corporation, municipal corporation or political subdivision. Any such contract entered into to supply water or sewer service to a municipal corporation or political subdivision shall provide that the payments to be made thereunder shall be solely from the revenues to be derived by such municipality or political subdivision from the operation of the waterworks system or sewer system of such municipality or political subdivision, and said contract shall be a continuing, valid and binding obligation of the municipality or political subdivision, payable from such revenues for such period of years, not to exceed 40, as may be provided in such contract. Any such contract shall not be a debt within the meaning of any statutory or constitutional limitations.
No prior appropriation shall be required before entering into such contract, and no appropriation shall be required to authorize payments to be made under the terms of any such contract, notwithstanding any provision of this Code to the contrary.
65 ILCS 5/11-136-8