65 ILCS 5/11-141-5
All bonds issued under this Division 141 are payable solely from the revenue derived from the operation of the sewerage system; provided, that bonds issued under this Division 141 may also be payable from funds pledged by the municipality issuing such bonds pursuant to the Illinois Finance Authority Act. Notwithstanding any such pledge or any other matter, these bonds shall not, in any event, constitute an indebtedness of the municipality within the meaning of any constitutional or statutory limitation. It shall be plainly stated on the face of each bond that the bond has been issued under this Division 141 and that it does not constitute an indebtedness of the municipality within any constitutional or statutory limitation.
65 ILCS 5/11-141-5