50 ILCS 505/7
If the funds from which the local governmental official or agency is to pay for goods or services are funds appropriated or controlled by the State, then the local governmental official or agency may certify to the State Treasurer, Comptroller and State agency responsible for administering such funds that a specified amount is anticipated to be necessary within 45 days after certification to pay for specified goods or services and that such amount is not currently available to the local governmental official or agency. The State Treasurer, Comptroller and State agency shall than expedite distribution of funds to the local governmental unit to make such payments. The certification shall be mailed on the date of certification by certified U. S. mail, return receipt requested. Any interest penalty incurred by the local governmental unit under Section 3 or 4 because of the failure of funds to be distributed from the State to the local governmental unit within the 45 day period shall be reimbursed by the State to the local governmental unit as an amount in addition to the funds to be otherwise distributed from the State.
50 ILCS 505/7