Illinois General Assembly - Full Text of SB3002

LRB104 18321 HLH 31761 b

104TH GENERAL ASSEMBLY
State of Illinois
2025 and 2026
SB3002

Introduced 1/27/2026, by Sen. Suzy Glowiak Hilton

SYNOPSIS AS INTRODUCED:

35 ILCS 200/18-185
35 ILCS 200/18-190.3 new

Amends the Property Tax Extension Limitation Law in the Property Tax Code. Makes changes to the definition of "limiting rate". Provides for alternative referendum procedures for a taxing district to increase its aggregate extension. Effective immediately.

A BILL FOR

AN ACT concerning revenue.

Be it enacted by the People of the State of Illinois, represented in the General Assembly:

Section 5. The Property Tax Code is amended by changing Section 18-185 and by adding Section 18-190.3 as follows:

(35 ILCS 200/18-185)

Sec. 18-185. Short title; definitions. This Division 5 may be cited as the Property Tax Extension Limitation Law. As used in this Division 5:

"Consumer Price Index" means the Consumer Price Index for All Urban Consumers for all items published by the United States Department of Labor.

"Extension limitation" means (a) the lesser of 5% or the percentage increase in the Consumer Price Index during the 12-month calendar year preceding the levy year or (b) the rate of increase approved by voters under Section 18-205.

"Affected county" means a county of 3,000,000 or more inhabitants or a county contiguous to a county of 3,000,000 or more inhabitants.

"Taxing district" has the same meaning provided in Section 1-150, except as otherwise provided in this Section. For the 1991 through 1994 levy years only, "taxing district" includes only each non-home rule taxing district having the majority of its 1990 equalized assessed value within any county or counties contiguous to a county with 3,000,000 or more inhabitants. Beginning with the 1995 levy year, "taxing district" includes only each non-home rule taxing district subject to this Law before the 1995 levy year and each non-home rule taxing district not subject to this Law before the 1995 levy year having the majority of its 1994 equalized assessed value in an affected county or counties. Beginning with the levy year in which this Law becomes applicable to a taxing district as provided in Section 18-213, "taxing district" also includes those taxing districts made subject to this Law as provided in Section 18-213.

"Aggregate extension" for taxing districts to which this Law applied before the 1995 levy year means the annual corporate extension for the taxing district and those special purpose extensions that are made annually for the taxing district, excluding special purpose extensions: (a) made for the taxing district to pay interest or principal on general obligation bonds that were approved by referendum; (b) made for any taxing district to pay interest or principal on general obligation bonds issued before October 1, 1991; (c) made for any taxing district to pay interest or principal on bonds issued to refund or continue to refund those bonds issued before October 1, 1991; (d) made for any taxing district to pay interest or principal on bonds issued to refund or continue to refund bonds issued after October 1, 1991 that were approved by referendum; (e) made for any taxing district to pay interest or principal on revenue bonds issued before October 1, 1991 for payment of which a property tax levy or the full faith and credit of the unit of local government is pledged; however, a tax for the payment of interest or principal on those bonds shall be made only after the governing body of the unit of local government finds that all other sources for payment are insufficient to make those payments; (f) made for payments under a building commission lease when the lease payments are for the retirement of bonds issued by the commission before October 1, 1991, to pay for the building project; (g) made for payments due under installment contracts entered into before October 1, 1991; (h) made for payments of principal and interest on bonds issued under the Metropolitan Water Reclamation District Act to finance construction projects initiated before October 1, 1991; (i) made for payments of principal and interest on limited bonds, as defined in Section 3 of the Local Government Debt Reform Act, in an amount not to exceed the debt service extension base less the amount in items (b), (c), (e), and (h) of this definition for non-referendum obligations, except obligations initially issued pursuant to referendum; (j) made for payments of principal and interest on bonds issued under Section 15 of the Local Government Debt Reform Act; (k) made by a school district that participates in the Special Education District of Lake County, created by special education joint agreement under Section 10-22.31 of the School Code, for payment of the school district's share of the amounts required to be contributed by the Special Education District of Lake County to the Illinois Municipal Retirement Fund under Article 7 of the Illinois Pension Code; the amount of any extension under this item (k) shall be certified by the school district to the county clerk; (l) made to fund expenses of providing joint recreational programs for persons with disabilities under Section 5-8 of the Park District Code or Section 11-95-14 of the Illinois Municipal Code; (m) made for temporary relocation loan repayment purposes pursuant to Sections 2-3.77 and 17-2.2d of the School Code; (n) made for payment of principal and interest on any bonds issued under the authority of Section 17-2.2d of the School Code; (o) made for contributions to a firefighter's pension fund created under Article 4 of the Illinois Pension Code, to the extent of the amount certified under item (5) of Section 4-134 of the Illinois Pension Code; (p) made for road purposes in the first year after a township assumes the rights, powers, duties, assets, property, liabilities, obligations, and responsibilities of a road district abolished under the provisions of Section 6-133 of the Illinois Highway Code; (q) made under Section 4 of the Community Mental Health Act to provide the necessary funds or to supplement existing funds for community mental health facilities and services, including facilities and services for the person with a developmental disability or a substance use disorder; and (r) made for the payment of principal and interest on any bonds issued under the authority of Section 17-2.11 of the School Code or to refund or continue to refund those bonds.

"Aggregate extension" for the taxing districts to which this Law did not apply before the 1995 levy year (except taxing districts subject to this Law in accordance with Section 18-213) means the annual corporate extension for the taxing district and those special purpose extensions that are made annually for the taxing district, excluding special purpose extensions: (a) made for the taxing district to pay interest or principal on general obligation bonds that were approved by referendum; (b) made for any taxing district to pay interest or principal on general obligation bonds issued before March 1, 1995; (c) made for any taxing district to pay interest or principal on bonds issued to refund or continue to refund those bonds issued before March 1, 1995; (d) made for any taxing district to pay interest or principal on bonds issued to refund or continue to refund bonds issued after March 1, 1995 that were approved by referendum; (e) made for any taxing district to pay interest or principal on revenue bonds issued before March 1, 1995 for payment of which a property tax levy or the full faith and credit of the unit of local government is pledged; however, a tax for the payment of interest or principal on those bonds shall be made only after the governing body of the unit of local government finds that all other sources for payment are insufficient to make those payments; (f) made for payments under a building commission lease when the lease payments are for the retirement of bonds issued by the commission before March 1, 1995 to pay for the building project; (g) made for payments due under installment contracts entered into before March 1, 1995; (h) made for payments of principal and interest on bonds issued under the Metropolitan Water Reclamation District Act to finance construction projects initiated before October 1, 1991; (h-4) made for stormwater management purposes by the Metropolitan Water Reclamation District of Greater Chicago under Section 12 of the Metropolitan Water Reclamation District Act; (h-8) made for payments of principal and interest on bonds issued under Section 9.6a of the Metropolitan Water Reclamation District Act to make contributions to the pension fund established under Article 13 of the Illinois Pension Code; (i) made for payments of principal and interest on limited bonds, as defined in Section 3 of the Local Government Debt Reform Act, in an amount not to exceed the debt service extension base less the amount in items (b), (c), and (e) of this definition for non-referendum obligations, except obligations initially issued pursuant to referendum and bonds described in subsections (h) and (h-8) of this definition; (j) made for payments of principal and interest on bonds issued under Section 15 of the Local Government Debt Reform Act; (k) made for payments of principal and interest on bonds authorized by Public Act 88-503 and issued under Section 20a of the Chicago Park District Act for aquarium or museum projects and bonds issued under Section 20a of the Chicago Park District Act for the purpose of making contributions to the pension fund established under Article 12 of the Illinois Pension Code; (l) made for payments of principal and interest on bonds authorized by Public Act 87-1191 or 93-601 and (i) issued pursuant to Section 21.2 of the Cook County Forest Preserve District Act, (ii) issued under Section 42 of the Cook County Forest Preserve District Act for zoological park projects, or (iii) issued under Section 44.1 of the Cook County Forest Preserve District Act for botanical gardens projects; (m) made pursuant to Section 34-53.5 of the School Code, whether levied annually or not; (n) made to fund expenses of providing joint recreational programs for persons with disabilities under Section 5-8 of the Park District Code or Section 11-95-14 of the Illinois Municipal Code; (o) made by the Chicago Park District for recreational programs for persons with disabilities under subsection (c) of Section 7.06 of the Chicago Park District Act; (p) made for contributions to a firefighter's pension fund created under Article 4 of the Illinois Pension Code, to the extent of the amount certified under item (5) of Section 4-134 of the Illinois Pension Code; (q) made by Ford Heights School District 169 under Section 17-9.02 of the School Code; (r) made for the purpose of making employer contributions to the Public School Teachers' Pension and Retirement Fund of Chicago under Section 34-53 of the School Code; (s) made under Section 4 of the Community Mental Health Act to provide the necessary funds or to supplement existing funds for community mental health facilities and services, including facilities and services for the person with a developmental disability or a substance use disorder; and (t) made for the payment of principal and interest on any bonds issued under the authority of Section 17-2.11 of the School Code or to refund or continue to refund those bonds.

"Aggregate extension" for all taxing districts to which this Law applies in accordance with Section 18-213, except for those taxing districts subject to paragraph (2) of subsection (e) of Section 18-213, means the annual corporate extension for the taxing district and those special purpose extensions that are made annually for the taxing district, excluding special purpose extensions: (a) made for the taxing district to pay interest or principal on general obligation bonds that were approved by referendum; (b) made for any taxing district to pay interest or principal on general obligation bonds issued before the date on which the referendum making this Law applicable to the taxing district is held; (c) made for any taxing district to pay interest or principal on bonds issued to refund or continue to refund those bonds issued before the date on which the referendum making this Law applicable to the taxing district is held; (d) made for any taxing district to pay interest or principal on bonds issued to refund or continue to refund bonds issued after the date on which the referendum making this Law applicable to the taxing district is held if the bonds were approved by referendum after the date on which the referendum making this Law applicable to the taxing district is held; (e) made for any taxing district to pay interest or principal on revenue bonds issued before the date on which the referendum making this Law applicable to the taxing district is held for payment of which a property tax levy or the full faith and credit of the unit of local government is pledged; however, a tax for the payment of interest or principal on those bonds shall be made only after the governing body of the unit of local government finds that all other sources for payment are insufficient to make those payments; (f) made for payments under a building commission lease when the lease payments are for the retirement of bonds issued by the commission before the date on which the referendum making this Law applicable to the taxing district is held to pay for the building project; (g) made for payments due under installment contracts entered into before the date on which the referendum making this Law applicable to the taxing district is held; (h) made for payments of principal and interest on limited bonds, as defined in Section 3 of the Local Government Debt Reform Act, in an amount not to exceed the debt service extension base less the amount in items (b), (c), and (e) of this definition for non-referendum obligations, except obligations initially issued pursuant to referendum; (i) made for payments of principal and interest on bonds issued under Section 15 of the Local Government Debt Reform Act; (j) made for a qualified airport authority to pay interest or principal on general obligation bonds issued for the purpose of paying obligations due under, or financing airport facilities required to be acquired, constructed, installed or equipped pursuant to, contracts entered into before March 1, 1996 (but not including any amendments to such a contract taking effect on or after that date); (k) made to fund expenses of providing joint recreational programs for persons with disabilities under Section 5-8 of the Park District Code or Section 11-95-14 of the Illinois Municipal Code; (l) made for contributions to a firefighter's pension fund created under Article 4 of the Illinois Pension Code, to the extent of the amount certified under item (5) of Section 4-134 of the Illinois Pension Code; (m) made for the taxing district to pay interest or principal on general obligation bonds issued pursuant to Section 19-3.10 of the School Code; (n) made under Section 4 of the Community Mental Health Act to provide the necessary funds or to supplement existing funds for community mental health facilities and services, including facilities and services for the person with a developmental disability or a substance use disorder; and (o) made for the payment of principal and interest on any bonds issued under the authority of Section 17-2.11 of the School Code or to refund or continue to refund those bonds.

"Aggregate extension" for all taxing districts to which this Law applies in accordance with paragraph (2) of subsection (e) of Section 18-213 means the annual corporate extension for the taxing district and those special purpose extensions that are made annually for the taxing district, excluding special purpose extensions: (a) made for the taxing district to pay interest or principal on general obligation bonds that were approved by referendum; (b) made for any taxing district to pay interest or principal on general obligation bonds issued before March 7, 1997 (the effective date of Public Act 89-718); (c) made for any taxing district to pay interest or principal on bonds issued to refund or continue to refund those bonds issued before March 7, 1997 (the effective date of Public Act 89-718); (d) made for any taxing district to pay interest or principal on bonds issued to refund or continue to refund bonds issued after March 7, 1997 (the effective date of Public Act 89-718) if the bonds were approved by referendum after March 7, 1997 (the effective date of Public Act 89-718); (e) made for any taxing district to pay interest or principal on revenue bonds issued before March 7, 1997 (the effective date of Public Act 89-718) for payment of which a property tax levy or the full faith and credit of the unit of local government is pledged; however, a tax for the payment of interest or principal on those bonds shall be made only after the governing body of the unit of local government finds that all other sources for payment are insufficient to make those payments; (f) made for payments under a building commission lease when the lease payments are for the retirement of bonds issued by the commission before March 7, 1997 (the effective date of Public Act 89-718) to pay for the building project; (g) made for payments due under installment contracts entered into before March 7, 1997 (the effective date of Public Act 89-718); (h) made for payments of principal and interest on limited bonds, as defined in Section 3 of the Local Government Debt Reform Act, in an amount not to exceed the debt service extension base less the amount in items (b), (c), and (e) of this definition for non-referendum obligations, except obligations initially issued pursuant to referendum; (i) made for payments of principal and interest on bonds issued under Section 15 of the Local Government Debt Reform Act; (j) made for a qualified airport authority to pay interest or principal on general obligation bonds issued for the purpose of paying obligations due under, or financing airport facilities required to be acquired, constructed, installed or equipped pursuant to, contracts entered into before March 1, 1996 (but not including any amendments to such a contract taking effect on or after that date); (k) made to fund expenses of providing joint recreational programs for persons with disabilities under Section 5-8 of the Park District Code or Section 11-95-14 of the Illinois Municipal Code; (l) made for contributions to a firefighter's pension fund created under Article 4 of the Illinois Pension Code, to the extent of the amount certified under item (5) of Section 4-134 of the Illinois Pension Code; (m) made under Section 4 of the Community Mental Health Act to provide the necessary funds or to supplement existing funds for community mental health facilities and services, including facilities and services for the person with a developmental disability or a substance use disorder; and (n) made for the payment of principal and interest on any bonds issued under the authority of Section 17-2.11 of the School Code or to refund or continue to refund those bonds.

"Debt service extension base" means an amount equal to that portion of the extension for a taxing district for the 1994 levy year, or for those taxing districts subject to this Law in accordance with Section 18-213, except for those subject to paragraph (2) of subsection (e) of Section 18-213, for the levy year in which the referendum making this Law applicable to the taxing district is held, or for those taxing districts subject to this Law in accordance with paragraph (2) of subsection (e) of Section 18-213 for the 1996 levy year, constituting an extension for payment of principal and interest on bonds issued by the taxing district without referendum, but not including excluded non-referendum bonds. For park districts (i) that were first subject to this Law in 1991 or 1995 and (ii) whose extension for the 1994 levy year for the payment of principal and interest on bonds issued by the park district without referendum (but not including excluded non-referendum bonds) was less than 51% of the amount for the 1991 levy year constituting an extension for payment of principal and interest on bonds issued by the park district without referendum (but not including excluded non-referendum bonds), "debt service extension base" means an amount equal to that portion of the extension for the 1991 levy year constituting an extension for payment of principal and interest on bonds issued by the park district without referendum (but not including excluded non-referendum bonds). A debt service extension base established or increased at any time pursuant to any provision of this Law, except Section 18-212, shall be increased each year commencing with the later of (i) the 2009 levy year or (ii) the first levy year in which this Law becomes applicable to the taxing district, by the lesser of 5% or the percentage increase in the Consumer Price Index during the 12-month calendar year preceding the levy year. The debt service extension base may be established or increased as provided under Section 18-212. "Excluded non-referendum bonds" means (i) bonds authorized by Public Act 88-503 and issued under Section 20a of the Chicago Park District Act for aquarium and museum projects; (ii) bonds issued under Section 15 of the Local Government Debt Reform Act; or (iii) refunding obligations issued to refund or to continue to refund obligations initially issued pursuant to referendum.

"Special purpose extensions" include, but are not limited to, extensions for levies made on an annual basis for unemployment and workers' compensation, self-insurance, contributions to pension plans, and extensions made pursuant to Section 6-601 of the Illinois Highway Code for a road district's permanent road fund whether levied annually or not. The extension for a special service area is not included in the aggregate extension.

"Aggregate extension base" means the taxing district's last preceding aggregate extension as adjusted under Sections 18-135, 18-215, 18-230, 18-206, and 18-233. Beginning with levy year 2022, for taxing districts that are specified in Section 18-190.7, the taxing district's aggregate extension base shall be calculated as provided in Section 18-190.7. An adjustment under Section 18-135 shall be made for the 2007 levy year and all subsequent levy years whenever one or more counties within which a taxing district is located (i) used estimated valuations or rates when extending taxes in the taxing district for the last preceding levy year that resulted in the over or under extension of taxes, or (ii) increased or decreased the tax extension for the last preceding levy year as required by Section 18-135(c). Whenever an adjustment is required under Section 18-135, the aggregate extension base of the taxing district shall be equal to the amount that the aggregate extension of the taxing district would have been for the last preceding levy year if either or both (i) actual, rather than estimated, valuations or rates had been used to calculate the extension of taxes for the last levy year, or (ii) the tax extension for the last preceding levy year had not been adjusted as required by subsection (c) of Section 18-135.

Notwithstanding any other provision of law, for levy year 2012, the aggregate extension base for West Northfield School District No. 31 in Cook County shall be $12,654,592.

Notwithstanding any other provision of law, for the purpose of calculating the limiting rate for levy year 2023, the last preceding aggregate extension base for Homewood School District No. 153 in Cook County shall be $19,535,377.

Notwithstanding any other provision of law, for levy year 2022, the aggregate extension base of a home equity assurance program that levied at least $1,000,000 in property taxes in levy year 2019 or 2020 under the Home Equity Assurance Act shall be the amount that the program's aggregate extension base for levy year 2021 would have been if the program had levied a property tax for levy year 2021.

"Levy year" has the same meaning as "year" under Section 1-155.

"New property" means (i) the assessed value, after final board of review or board of appeals action, of new improvements or additions to existing improvements on any parcel of real property that increase the assessed value of that real property during the levy year multiplied by the equalization factor issued by the Department under Section 17-30, (ii) the assessed value, after final board of review or board of appeals action, of real property not exempt from real estate taxation, which real property was exempt from real estate taxation for any portion of the immediately preceding levy year, multiplied by the equalization factor issued by the Department under Section 17-30, including the assessed value, upon final stabilization of occupancy after new construction is complete, of any real property located within the boundaries of an otherwise or previously exempt military reservation that is intended for residential use and owned by or leased to a private corporation or other entity, (iii) in counties that classify in accordance with Section 4 of Article IX of the Illinois Constitution, an incentive property's additional assessed value resulting from a scheduled increase in the level of assessment as applied to the first year final board of review market value, and (iv) any increase in assessed value due to oil or gas production from an oil or gas well required to be permitted under the Hydraulic Fracturing Regulatory Act that was not produced in or accounted for during the previous levy year. In addition, the county clerk in a county containing a population of 3,000,000 or more shall include in the 1997 recovered tax increment value for any school district, any recovered tax increment value that was applicable to the 1995 tax year calculations.

"Qualified airport authority" means an airport authority organized under the Airport Authorities Act and located in a county bordering on the State of Wisconsin and having a population in excess of 200,000 and not greater than 500,000.

"Recovered tax increment value" means, except as otherwise provided in this paragraph, the amount of the current year's equalized assessed value, in the first year after a municipality terminates the designation of an area as a redevelopment project area previously established under the Tax Increment Allocation Redevelopment Act in the Illinois Municipal Code, previously established under the Industrial Jobs Recovery Law in the Illinois Municipal Code, previously established under the Economic Development Project Area Tax Increment Act of 1995, or previously established under the Economic Development Area Tax Increment Allocation Act, of each taxable lot, block, tract, or parcel of real property in the redevelopment project area over and above the initial equalized assessed value of each property in the redevelopment project area. For the taxes which are extended for the 1997 levy year, the recovered tax increment value for a non-home rule taxing district that first became subject to this Law for the 1995 levy year because a majority of its 1994 equalized assessed value was in an affected county or counties shall be increased if a municipality terminated the designation of an area in 1993 as a redevelopment project area previously established under the Tax Increment Allocation Redevelopment Act in the Illinois Municipal Code, previously established under the Industrial Jobs Recovery Law in the Illinois Municipal Code, or previously established under the Economic Development Area Tax Increment Allocation Act, by an amount equal to the 1994 equalized assessed value of each taxable lot, block, tract, or parcel of real property in the redevelopment project area over and above the initial equalized assessed value of each property in the redevelopment project area. In the first year after a municipality removes a taxable lot, block, tract, or parcel of real property from a redevelopment project area established under the Tax Increment Allocation Redevelopment Act in the Illinois Municipal Code, the Industrial Jobs Recovery Law in the Illinois Municipal Code, or the Economic Development Area Tax Increment Allocation Act, "recovered tax increment value" means the amount of the current year's equalized assessed value of each taxable lot, block, tract, or parcel of real property removed from the redevelopment project area over and above the initial equalized assessed value of that real property before removal from the redevelopment project area.

Except as otherwise provided in this Section, "limiting rate" means a fraction the numerator of which is the last preceding aggregate extension base times an amount equal to one plus the extension limitation defined in this Section and the denominator of which is the current year's equalized assessed value of all real property in the territory under the jurisdiction of the taxing district during the prior levy year. If an increase in the district's aggregate extension has been approved by referendum on or after January 1, 2027, then, for the year for which the increase has been approved, the limiting rate for that district shall be a fraction, the numerator of which is the sum of (i) the last preceding aggregate extension base times an amount equal to one plus the extension limitation defined in this Section and (ii) the amount of the increase approved by referendum under Section 18-190.3 of this Law, and the denominator of which is the current year's equalized assessed value of all real property in the territory under the jurisdiction of the taxing district during the prior levy year. For those taxing districts that reduced their aggregate extension for the last preceding levy year, except for school districts that reduced their extension for educational purposes pursuant to Section 18-206, the highest aggregate extension in any of the last 3 preceding levy years shall be used for the purpose of computing the limiting rate. The denominator shall not include new property or the recovered tax increment value. If a new rate, a rate decrease, or a limiting rate increase has been approved at an election held after March 21, 2006, then (i) the otherwise applicable limiting rate shall be increased by the amount of the new rate or shall be reduced by the amount of the rate decrease, as the case may be, or (ii) in the case of a limiting rate increase, the limiting rate shall be equal to the rate set forth in the proposition approved by the voters for each of the years specified in the proposition, after which the limiting rate of the taxing district shall be calculated as otherwise provided. In the case of a taxing district that obtained referendum approval for an increased limiting rate on March 20, 2012, the limiting rate for tax year 2012 shall be the rate that generates the approximate total amount of taxes extendable for that tax year, as set forth in the proposition approved by the voters; this rate shall be the final rate applied by the county clerk for the aggregate of all capped funds of the district for tax year 2012.

(Source: P.A. 103-154, eff. 6-30-23; 103-587, eff. 5-28-24; 103-591, eff. 7-1-24; 103-592, eff. 6-7-24; 104-417, eff. 8-15-25.)

(35 ILCS 200/18-190.3 new)

Sec. 18-190.3. Direct referendum; increased aggregate extension. As an alternative to the procedures set forth in Sections 18-190 and 18-205, a taxing district may increase its aggregate extension to an amount that exceeds the amount that would otherwise be permitted under this Law if the taxing district obtains referendum approval as provided in this Section.

The proposition seeking to obtain referendum approval to increase the aggregate extension shall be in substantially the following form:

"Shall the aggregate extension (the total dollar amount levied by the district for each of the tax funds included under the Property Tax Limitation Law) for...(insert legal name, number, if any, and county or counties of taxing district and geographic or other common name by which a school or community college district is known and referred to), Illinois, be increased by (insert the amount of increase sought) for levy year...(insert the levy year for which the increase will take effect)?"

The votes must be recorded as "Yes" or "No".

The ballot for any proposition submitted pursuant to this Section shall have printed thereon, but not as a part of the proposition submitted, only the following supplemental information (which shall be supplied to the election authority by the taxing district) in substantially the following form:

"(1) The amount of taxes extended which were subject to the Property Tax Cap (Property Tax Extension Limitation Law) in levy year (insert most recent levy year) was (insert the most recent levy year's aggregate extension base). If the proposition is not approved, then the taxing district may increase its extension by the lesser of 5% or the percentage increase in the Consumer Price Index during the 12-month calendar year preceding (insert levy year). If the proposition is approved, then the taxing district may increase its extension in levy year (insert levy year) by an additional (insert the amount of increase sought).

(2) For the...(insert levy year for which the increase will be applicable) levy year, the approximate amount of the additional tax extendable against property containing a single family residence and having a fair market value at the time of the referendum of $100,000 is estimated to be (insert amount).".

The approximate amount of the additional taxes extendable shown in paragraph (2) shall be calculated by multiplying $100,000 (the fair market value of the property without regard to any property tax exemptions) by (i) the percentage level of assessment prescribed for that property by statute, or by ordinance of the county board in counties that classify property for purposes of taxation in accordance with Section 4 of Article IX of the Illinois Constitution; (ii) the most recent final equalization factor certified to the county clerk by the Department of Revenue at the time the taxing district initiates the submission of the proposition to the electors; and (iii) the increase in the aggregate extension proposed in the question; and dividing the result by the last known equalized assessed value of the taxing district at the time the submission of the question is initiated by the taxing district. Any notice required to be published in connection with the submission of the proposition shall also contain this supplemental information and shall not contain any other supplemental information regarding the proposition. Any error, miscalculation, or inaccuracy in computing any amount set forth on the ballot and in the notice that is not deliberate shall not invalidate or affect the validity of any proposition approved. Notice of the referendum shall be published and posted as otherwise required by law, and the submission of the proposition shall be initiated as provided by law.

If a majority of all ballots cast on the proposition are in favor of the proposition, then the district may increase its aggregate extension as provided in the referendum.

Section 99. Effective date. This Act takes effect upon becoming law.