105 ILCS 5/17-3A
Notwithstanding any other provision of this Code, if a court, in any tax objection based on the apportionment of an overlapping taxing district under Section 18-155 of the Property Tax Code, for any year prior to the year of the effective date of this amendatory Act of the 92nd General Assembly, enters a final judgment that there was an over extension or under extension of taxes for an overlapping taxing district based on the apportionment under Section 18-155 of the Property Tax Code for the year for which the objection was filed, the county clerks of each county in which there was an under extension of a levy of a school district shall proportionately increase the levy of that school district by an amount specified in the court order in that county in the subsequent year or in any subsequent year following the final judgment of the court. The increase in the levy of the school district, when extended, shall be set forth as a separate item on the tax bills of affected taxpayers. Notwithstanding any other provision of law, the increase in the levy and the extension thereof shall not be subject to any limitations on levies or extensions imposed by this Code or the Property Tax Code. The funds collected pursuant to a levy increase authorized by this Section and Section 18-155 of the Property Tax Code shall be delivered to the county collector of each county in which there was an over extension for distribution to the tax objectors in accordance with the court order.
105 ILCS 5/17-3A