70 ILCS 905/24
The bonds authorized by this act shall be sold and the proceeds thereof used solely for the specified purpose. At or before the time of delivery of any bond, the board shall file with the county clerk of each county in which the district is situated its certificates, stating the amount of bonds to be issued, or denominations, rate of interest, where payable, and shall include a form of bond to be issued. The board shall levy a direct tax upon all of the taxable property within the district sufficient to pay the principal and interest on the bonds as and when the same respectively mature. The certificates so filed shall be full authority to the county clerk to extend the tax named therein upon all the taxable property within the district. Such tax shall be in addition to all other taxes and shall not be within any rate limitation otherwise prescribed by law.
The proceeds received from the sale of the bonds shall be received and held by the board and expended under its direction upon the warrant of a majority of the members.
70 ILCS 905/24