65 ILCS 5/8-1-6
Neither the corporate authorities nor any department or officer of any municipality shall add to the municipal expenditures in any fiscal year anything over and above the amount provided for in the annual appropriation ordinance of that year. No expenditure for an improvement to be paid for out of the general fund of the municipality shall exceed in any fiscal year the amount provided for that improvement in the annual appropriation ordinance.
However, nothing herein contained shall prevent the corporate authorities, by a two-thirds vote, from making additional appropriations for the purpose of making improvements or restorations, the necessity for which is caused by any casualty or accident happening after the annual appropriation ordinance is passed, nor from making additional appropriations necessary to meet any emergency, happening after and unforeseen at the time of passing the annual appropriation ordinance. Emergency, as used in this section, means a condition requiring immediate action to suppress or prevent the spread of disease, or to prevent or remove imminent danger to persons or property. For the purpose of providing for these additional appropriations, the corporate authorities, by a two-thirds vote, may authorize the mayor, or village president, and the finance committee, or in municipalities under the commission form of municipal government the mayor and commissioner of accounts and finances, to borrow the amount of money necessary therefor for a space of time not extending beyond the close of the next fiscal year. The sum borrowed and the interest thereon, shall be added to the amount authorized to be raised in the next general tax levy and embraced therein.
Should a judgment be obtained against a municipality, the mayor, or village president, and the finance committee, or the mayor and commissioner of accounts and finances, in commission form municipalities, under the sanction of the corporate authorities, may borrow a sufficient amount to pay the judgment for a space of time not extending beyond the close of the next fiscal year. This sum and the interest thereon shall in like manner be added to the amount authorized to be raised in the general tax levy of the next year and embraced therein.
This section shall not apply to municipalities operating under special charters.
65 ILCS 5/8-1-6