110 ILCS 805/7-21: Tax anticipation warrants.

When there is not sufficient money in the treasury to meet the ordinary and necessary expenses for educational purposes and for operations and maintenance of facilities purposes, the board may order issued warrants against and in anticipation of any taxes levied for the payment of the expenditures for educational purposes and for operations and maintenance of facilities purposes, to the extent of 85% of the total amount of the taxes levied for those purposes.