70 ILCS 3010/12

Every sanitary district has the power to construct or acquire a sewerage system to serve a particular locality within its corporate limits or to extend or improve an existing sewerage system for the purpose of serving a particular locality within the sanitary district not theretofore served by its existing sewerage 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 entire sewerage system or systems of the sanitary district. Except insofar as inconsistent with this section, the provisions of sections 2 to 11, inclusive, govern all matters connected with a project under this section.