55 ILCS 5/6-29004
All monies received from any tax levied pursuant to this Division shall be set apart in the county working cash fund by the county treasurer and shall be used only for the purposes and in the manner provided in this Section and Section 6-29005. Such fund, and the monies therein, may not be regarded as current assets available for appropriation nor appropriated by the county board in the annual appropriation bill. The county board may appropriate monies to the working cash fund up to the maximum amount allowable in the fund, and the working cash fund may receive such appropriations and any other contributions. In order to provide monies with which to meet ordinary and necessary disbursements for salaries and other corporate purposes, such fund and the monies therein may be transferred, in whole or in part, to the general corporate fund of the county and so disbursed therefrom in anticipation of the collection of any taxes lawfully levied for general corporate purposes or in anticipation of such taxes, as by law now or hereafter enacted or amended, imposed by the General Assembly of the State of Illinois to replace revenue lost by units of local government and school districts as a result of the abolition of ad valorem personal property taxes, pursuant to Article IX, Section 5(c) of the Constitution of the State of Illinois and in anticipation of the receipt of monies to be derived from fees and commissions to be earned by the county clerk and the county collector for extending and collecting taxes levied.
Monies transferred to the general corporate fund in anticipation of the collection of taxes shall be treated as transferred in anticipation of the collection of that part of the taxes so levied or to be received which is in excess of the amount or amounts thereof required to pay (a) any warrants and the interest thereon, theretofore or thereafter issued, (b) the aggregate amount of receipts from taxes imposed to replace revenue lost by units of local government and school districts as a result of the abolition of ad valorem personal property taxes, pursuant to Article IX, Section 5(c) of the Constitution of the State of Illinois, which the corporate authorities estimate will be set aside for the payment of the proportionate amount of debt service and pension or retirement obligations, as required by Section 12 of the State Revenue Sharing Act, and (c) any notes and the interest thereon, theretofore or thereafter issued, and such taxes levied for general corporate purposes when collected shall be applied, first, to the payment of any such warrant or notes and the interest thereon, the amount estimated to be required to satisfy debt service and pension or retirement obligations as set forth in Section 12 of the State Revenue Sharing Act, and then to the reimbursement of the working cash fund as hereinafter provided. Upon the receipt by the county treasurer of any taxes, or other monies, in anticipation of the collection or receipt whereof monies of the county working cash fund have been so transferred for disbursement, such fund must immediately be reimbursed therefrom until the full amount so transferred has been re-transferred to such fund. Unless the taxes and other monies so received and applied to the reimbursement of the working cash fund, before the close of the fiscal year following the fiscal year in which the last tax penalty date fall due, are sufficient to effect a complete reimbursement of such fund for any monies transferred therefrom in anticipation of the collection or receipt of such taxes, or other monies, the working cash fund must be reimbursed for the amount of the deficiency therein from any other revenues accruing to the general corporate fund, and the county board shall provide for the immediate reimbursement of the amount of any such deficiency in its next resolution termed the annual appropriations bill.
55 ILCS 5/6-29004