35 ILCS 200/9-45
2021 Illinois Compiled Statutes|Chapter 35 - REVENUE|35 ILCS 200/ - Property Tax Code.|Title 3 - Valuation and Assessment

Sec. 9-45. Property index number system. The county clerk in counties of  3,000,000 or more inhabitants and, subject to the approval of the county board,  the chief county assessment officer or recorder, in counties of less than  3,000,000 inhabitants, may establish a property index number system under which  property may be listed for purposes of assessment, collection of taxes or  automation of the office of the recorder. The system may be adopted in addition  to, or instead of, the method of listing by legal description as provided in  Section 9-40. The system shall describe property by township, section,  block, and parcel or lot, and may cross-reference the street or post office  address, if any, and street code number, if any. The county clerk, county  treasurer, chief county assessment officer or recorder may establish and  maintain cross indexes of numbers assigned under the system with the complete  legal description of the properties to which the numbers relate. Index numbers  shall be assigned by the county clerk in counties of 3,000,000 or more  inhabitants, and, at the direction of the county board in counties with less  than 3,000,000 inhabitants, shall be assigned by the chief county assessment  officer or recorder. Tax maps of the county clerk, county treasurer or chief  county assessment officer shall carry those numbers. The indexes shall be open  to public inspection and be made available to the public.  Any property index  number system established prior to the effective date of this Code shall remain  valid. However, in counties with less than 3,000,000 inhabitants, the system  may be transferred to another authority upon the approval of the county board.Any real property used for a power generating or automotive manufacturing  facility located within a county of less than 1,000,000 inhabitants, as to  which litigation with respect to its assessed valuation is pending or was  pending as of January 1, 1993, may be the subject of a real  property tax assessment settlement agreement among the taxpayer and taxing  districts in which it is situated.  In addition, any real property that is (i) used for natural gas extraction and fractionation or olefin and polymer manufacturing  and (ii) located within a county of less than 1,000,000 inhabitants may be the subject of a real  property tax assessment settlement agreement among the taxpayer and taxing  districts in which the property is situated if litigation is or was pending as to its assessed valuation as of January 1, 2003 or thereafter. Other appropriate authorities, which  may include county and State boards or officials, may also be parties to  such agreements.  Such agreements may include the assessment of the  facility or property for any years in dispute as well as for up to 10 years in the future.  Such agreements may provide for the settlement of issues relating to the  assessed value of the facility and may provide for related payments,  refunds, claims, credits against taxes and liabilities in respect to past  and future taxes of taxing districts, including any fund created under  Section 20-35 of this Act, all implementing the settlement  agreement.  Any such agreement may provide that parties thereto agree not to  challenge assessments as provided in the agreement.  An agreement entered  into on or after January 1, 1993 may provide for the classification of property  that is the subject of the agreement as real or personal during the term of the  agreement and thereafter.  It may also provide that taxing  districts agree to reimburse the taxpayer for amounts paid by the taxpayer  in respect to taxes for the real property which is the subject of the  agreement to the extent levied by those respective districts, over and  above amounts which would be due if the facility were to be assessed as  provided in the agreement.  Such reimbursement may be provided in the  agreement to be made by credit against taxes of the taxpayer.  No credits  shall be applied against taxes levied with respect to debt service or lease  payments of a taxing district.  No referendum approval or appropriation  shall be required for such an agreement or such credits and any such  obligation shall not constitute indebtedness of the taxing district for  purposes of any statutory limitation.  The county collector shall treat  credited amounts as if they had been received by the collector as taxes  paid by the taxpayer and as if remitted to the district.  A county  treasurer who is a party to such an agreement may agree to hold amounts  paid in escrow as provided in the agreement for possible use for paying  taxes until conditions of the agreement are met and then to apply these  amounts as provided in the agreement.  No such settlement agreement shall  be effective unless it shall have been approved by the court in which such  litigation is pending.  Any such agreement which has been entered into  prior to adoption of this amendatory Act of 1988 and which is contingent  upon enactment of authorizing legislation shall be binding and enforceable.  (Source: P.A. 96-609, eff. 8-24-09.)