65 ILCS 5/8-2-3
Proposed appropriations in municipalities specified in Section 8-2-1 shall be arranged according to funds and also according to departments and other separate agencies of the municipal government. The budget document shall specify the objects and purposes for which appropriations are to be made and the amount proposed to be appropriated for each object or purpose. It shall include proposed appropriations for (1) all current expenditures or charges to be made or incurred during the fiscal year for which appropriations are made; (2) all final judgments, including accrued interest thereon, entered against the municipality and unpaid at the beginning of that fiscal year, (3) any amount for which the corporate authorities of the municipality are required to reimburse the working cash fund from the general corporate fund pursuant to the provisions of Division 6 of this Article 8, (4) the taxes levied for the purposes of the reserves provided for in the Illinois Pension Code, as now or hereafter amended, (5) all other liabilities, and (6) an amount estimated to be sufficient to cover the loss and cost of collecting taxes to be levied for that fiscal year. This last designated amount shall include (1) uncollectible taxes, (2) the cost of collecting taxes (3) the amount of taxes levied for the nonpayment of which real estate will be forfeited to the state, and (4) the amount of taxes extended upon the collector's books which will be abated. However, the corporate authorities of the municipality shall not be required to appropriate any amount from the general corporate fund of the municipality for the payment of any judgment, for which a special tax has been authorized by law, or for the payment of any other liability of the general corporate fund incurred prior to January 1, 1945.
65 ILCS 5/8-2-3