70 ILCS 2605/10.1
Every sanitary district shall also have the power to construct a sewerage system or drainage system to serve a particular locality within its corporate limits or to extend or improve an existing sewerage system or drainage system, for the purpose of serving a particular locality within the sanitary district not theretofore served by its existing sewerage system or drainage system, and to pay the cost thereof by the issuance and sale of revenue bonds of the sanitary district, payable solely from the revenue derived from the operation of the sewerage system or drainage system, constructed or acquired for that particular locality, or from the revenue to be derived from the operation of the improvements and extensions of an existing system.
These bonds may be issued for maturities not exceeding 40 years from the date of the bonds and in such amounts as may be necessary to provide sufficient funds to pay all the costs of the improvement, or extension, or construction, or acquisition for improvement and extension of the sewerage system or drainage system, including engineering, legal and other expenses, together with interest, to a date 6 months subsequent to the estimated date of completion. These bonds shall bear interest at a rate not exceeding that permitted by "An Act to authorize public corporations to issue bonds, other evidences of indebtedness and tax anticipation warrants subject to interest rate limitations set forth therein", approved May 26, 1970, as amended, payable semi-annually. Bonds issued under this Act are negotiable instruments. They shall be executed by the presiding officer and clerk of the sanitary district, or such other officer or officers as the trustees may, by resolution, designate, and shall be sealed with the sanitary district corporate seal. In case any officer whose signature appears on the bonds or coupons ceases to hold that office before the bonds are delivered, his signature nevertheless, shall be valid and sufficient for all purposes, the same as though he had remained in office until the bonds were delivered. The bonds shall be sold in such manner and upon such terms as the board of trustees shall determine.
Bonds issued under this section are payable from revenue derived from the operation of that sewerage system or drainage system or improvement or extension. These bonds shall not, in any event, constitute an indebtedness of the sanitary district, within the meaning of any constitutional or statutory limitation, and it shall be so stated on the face of each bond. The face of each bond shall also contain a description of the locality for which that system or improvement or extension is constructed and acquired.
70 ILCS 2605/10.1