55 ILCS 5/5-32051
The county shall have the right to call and pay the bonds authorized in Section 5-32049 or any number thereof in the following manner. Whenever there are sufficient funds in the hands of the treasurer to redeem one or more of the bonds, after the payment of all interest due, and after the establishment of such reserve, if any, as the treasurer, in his discretion, may deem advisable to pay interest to become due at the next interest coupon date, the treasurer by publication as provided in this Section, shall call and pay such bond or bonds. The county treasurer shall cause notice of such call for payment to be published in a newspaper published in the county, or if no newspaper is published therein, then in a newspaper with a general circulation within the county. The notice shall specify the number or numbers of the bonds called, designating the assessment against which the bonds have been issued, and directing presentation of such bonds for payment and cancellation, and indicating that interest will cease on the bonds not less than 15 days nor more than 30 days from the date of the publication of such notice, and thereafter the bonds shall cease to bear interest. The presentation of any bond to the treasurer for payment shall waive the necessity of giving notice of its call for payment.
The treasurer upon accumulation of sufficient funds shall pay one or more bonds and shall call and pay such bonds. Any bondholder or holder of any interest coupon appertaining to any bond, after giving reasonable notice, shall be entitled to summary relief by mandamus or injunction to enforce these provisions.
When bonds are issued under Section 5-32049 all collections of the special assessment installments and all interests collected shall constitute a single fund which shall be applied first to the payment of interest due and to the establishment of such reserve, if any, as the treasurer in his discretion may deem advisable to pay interest to become due at the next interest coupon date, and then to the redemption and payment of bonds as provided herein. Where the ordinance for the improvement provides for the collection of all costs, collections made on the first installment shall be used first to pay such costs and any surplus shall be used to pay bonds and interest as provided herein. Provisions as to redemption and call of the bonds shall be inserted in each of the bonds issued in accordance with the provisions of this Section.
55 ILCS 5/5-32051