65 ILCS 5/11-119.1-8
A municipal power agency may establish, levy, and collect or may authorize, by contract, franchise, lease, or otherwise, the establishment, levying and collection of rents, rates and other charges for the products and services afforded by the municipal power agency or by or in connection with any project or properties which it may construct, acquire, own, operate, or control or with respect to which it may have any interest or any right to the products and services thereof as it may deem necessary, proper, desirable or reasonable. Rents, rates, and other charges shall be at least sufficient to meet the operation, maintenance and other expenses thereof, including reasonable reserves, interest, and principal payments, including payments into one or more sinking funds for the retirement of principal. A municipal power agency may pledge its rates, rents, and other revenue, or any part thereof, as security for the repayment, with interest and premium, if any, of any moneys borrowed by it or advanced to it for any of its authorized purposes and as security for the payment of amounts due and owing by it under any contract.
65 ILCS 5/11-119.1-8