(65 ILCS 5/11-137-1) (from Ch. 24, par. 11-137-1)
    Sec. 11-137-1. To enable municipalities to promote and procure the construction and installation of waterworks and sewerage systems when it becomes necessary for public health and welfare or for better sanitary conditions of a municipality, each municipality may contract with any person for a supply of water for public use, and for sewerage for drainage and sanitary purposes of the municipality, for a period not exceeding 30 years. Any contract that is entered into by a municipality and pledged to secure the bonds issued to construct any waterworks or sewerage system shall enure at all times and under all conditions to the benefit of the holders of any of the bonds so issued and for the payment of those bonds.
(Source: Laws 1961, p. 576.)