65 ILCS 5/11-118-2
The corporate authorities of any municipality availing itself of the provisions of this Division 118, shall adopt an ordinance describing in a general way the heating plant and system to be constructed and refer to the plans and specifications prepared for that purpose, which shall be open to the inspection of the public. This ordinance shall set out the estimated cost of the heating plant and system and fix the amount of bonds proposed to be issued, maturity, interest rate, and all details in respect thereof. Revenue bonds issued under this Division 118 shall be payable solely from the revenue derived from the heating plant and system. These bonds shall not in any event constitute an indebtedness of the municipality within the meaning of the constitutional provisions or limitations. It shall be plainly stated on the face of each bond that the bond has been issued under the provisions of this Division 118 and that it does not constitute an indebtedness of the municipality within any constitutional or statutory limitation.
After this ordinance has been adopted, it shall be published as provided in Section 1-2-4. After the expiration of 10 days from the date of this publication, the ordinance shall be in effect.
65 ILCS 5/11-118-2