50 ILCS 430/3
Each warrant issued under this Act may be made payable at the time fixed in the warrant and shall bear interest, payable only out of the taxes against which it is drawn, at a rate of interest specified in the warrant but not exceeding 7% if issued prior to January 1, 1972, and at the rate of not more than 8% if issued after January 1, 1972 and before November 12, 1981, and at a rate not to exceed the rate permitted in "An Act to authorize public corporations to issue bonds, other evidences of indebtedness and tax anticipation warrants subject to interest rate limitations set forth therein", approved May 26, 1970, as now or hereafter amended if issued on or after November 12, 1981, annually from the date of issuance until paid, or until notice is given by publication in a newspaper or otherwise, that the money for its payment is available, and that it will be paid on presentation. All jurors' certificates shall be issued in conformity with this Act. This Act does not apply to school districts, cities, villages, or incorporated towns. For the purposes of this Section, "prime commercial rate" means such prime rate as from time to time is publicly announced by the largest commercial banking institution located in this State, as measured by total assets.
50 ILCS 430/3