65 ILCS 5/11-129-10
After adoption of an ordinance for a project under Section 11-129-9, the corporate authorities may make and enforce all needful rules and regulations in connection with the construction, acquisition, improvement, or extension, and with the management and maintenance of the project to be constructed or acquired. The corporate authorities shall establish rates or charges to each user of the water-supply system, improvement or extension at a rate which will be sufficient at all times to pay the principal and interest of any bonds issued to pay the cost thereof, maintenance, and operation of the system, improvement, or extension and an adequate depreciation fund therefor. Charges or rates shall be established, revised, and maintained by ordinance and become payable as the corporate authorities may determine by ordinance.
65 ILCS 5/11-129-10