65 ILCS 90/22
If a property tax is levied, the tax shall be extended by the county clerk in the wastewater disposal zone in the manner provided by the Property Tax Code based on assessed values as established pursuant to the Property Tax Code. In such case, the municipality shall file a certified copy of the ordinance creating the wastewater disposal zone, including an accurate map thereof, with the county clerk. In addition, the corporate authorities shall file a certified copy of each ordinance levying taxes in the wastewater disposal zone on or before the third Tuesday of September of each year and shall file a certified copy of an ordinance authorizing the issuance of bonds and providing for a property tax levy therein by December 31 of the year of the first levy.
65 ILCS 90/22