105 ILCS 5/17-2.4
The school board of any district having a population of less than 500,000 inhabitants may, by proper resolution, levy an annual tax of not more than .05% upon the value as equalized or assessed by the Department of Revenue for such purpose, and may accumulate such tax for not more than 5 years, for area vocational education building purposes, including the purposes authorized by Section 10-22.31b of this Act, upon condition that there are not sufficient funds available in the operations and maintenance fund of the district to pay the cost thereof. Such tax shall not be levied without prior approval of the State Superintendent of Education and prior approval by a majority of the electors voting upon the proposition at an election, the proposition having been certified by the secretary of the school board to the proper election authorities for submission to the electorate in accordance with the general election law.
When the school boards of two or more districts enter into a joint agreement for an area vocational education building program under Section 10-22.31b their agreement may provide, or may be amended to provide, that the question of the levy of the tax authorized by this Section shall be certified to the proper election authorities, for submission to the voters of all of the participating districts in accordance with the general election law, in the same election and that the approval of that levy by a majority of the electors voting upon the proposition in the area comprised of the participating districts, considered as a whole, shall be deemed to authorize that levy in each participating district without regard to the passage or failure of the proposition in any district considered separately. However, the school board of any district may withdraw from the joint agreement by reason of the failure of the electors of that district to approve the proposed levy.
105 ILCS 5/17-2.4