70 ILCS 2405/22a.52
If, after final settlement with the contractor for any improvement and after full payment of all vouchers or bonds except those bonds and interest coupons not presented for payment, although called and for which funds are available and reserved, within the period of time specified in Section 9-1-5 of the Illinois Municipal Code, as now or hereafter amended, issued on account of that improvement, there is any surplus remaining in the special assessment or special tax above the specified payments and above the amount necessary for the payment of interest on those vouchers or bonds, such surplus shall be applied to reimbursing the public benefit fund for any amounts paid from such fund on account of the improvement. If, after the public benefit fund has been reimbursed, a surplus still remains, the trustees of the district shall declare at once a rebate upon each lot, block, tract or parcel of land assessed of its pro rata proportion of that surplus, provided that no property shall be entitled to a rebate unless the amount thereof exceeds $25, and on any property as to which the amount is less than $25 the amount shall be credited to the district's general fund. Such rebate shall be paid to the owner of record of each such lot, block, tract or parcel at the time of the declaration of the rebate. Should any additional funds be collected after the original rebate is declared, the district shall not be required to declare a supplemental rebate for 5 years from the date the original rebate is declared. The district may deduct for its cost and expenses for declaring and making any rebate not more than 5% of the amount declared to be rebated. The committee shall keep and exhibit publicly in its office an index of all warrants upon which rebates are due and payable and upon proper proof, the warrants shall be repaid to the persons entitled thereto.
70 ILCS 2405/22a.52