65 ILCS 5/9-2-129
The municipality shall have the right to call and pay the bonds authorized in Section 9-2-127, 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 or posting of notice as provided in this section, shall call and pay such bond or bonds. The treasurer shall cause notice of such call for payment to be published in a newspaper published in the municipality, or if no newspaper is published therein, then in a newspaper with a general circulation within the municipality, and if there be no such newspaper, then by posting in at least 3 prominent places within the municipality. 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 5 nor more than 30 days from the date of publication of such notice or posting, 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 9-2-127, all collections of the special assessment installments and all interest 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. However, in municipalities having a population of less than 500,000, where the ordinance for the improvement provides for the collection of 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 thereon as provided herein. Provision 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 9-2-129.
65 ILCS 5/9-2-129