105 ILCS 5/17-2.3
The school board of any district desiring to levy and accumulate for not more than 6 years the capital improvements purposes tax provided for in paragraph (4) of Section 17-2 of this Act shall pass a resolution for the levy of said tax, and in such resolution shall describe the capital improvements for which the tax is to be levied and the funds derived therefrom are to be spent. As used in this Section and in paragraph (4) of Section 17-2, capital improvements include but are not limited to the construction of a new school building or buildings or the purchase of school grounds on which any new school building is to be constructed or located, or both. The resolution shall cause the proposition for the levy of the tax provided for in paragraph (4) of Section 17-2 of this Act to be certified to the proper election authorities for submission to the electors of the district at a regular scheduled election in accordance with the general election law. The proposition shall generally describe the capital improvements for which the tax is to be levied and the funds derived therefrom are to be spent.
If the proposition is approved by a majority of the electors voting thereon, the school district may thereafter levy such capital improvement purposes tax and accumulate funds for not more than 6 years for the capital improvements described in the resolution and on the ballot. Such school district shall also invest such accumulated funds until spent for the capital improvements described in the resolution and on the ballot in accordance with the provisions of the Public Funds Investment Act.
Any proceeds derived from a capital improvements tax or the accumulation of monies for capital improvements described in the resolution and on the ballot shall be accounted for separately within the Site and Construction/Capital Improvement Fund.
105 ILCS 5/17-2.3