70 ILCS 2805/79
Except as otherwise provided in Section 9-2-113 of the Illinois Municipal Code, as now or hereafter amended, within 6 months after judgment of confirmation of any special assessment or special tax levied in pursuance of this Act has been entered, if there is no appeal perfected, or other stay of proceedings by a court having jurisdiction, or in case the judgment for the condemnation of any property for any such improvement, or the judgment of confirmation as to any property is appealed from, then, if the petitioner files in the cause a written election to proceed with the work, notwithstanding the appeal, or other stay, steps shall be taken to let the contract for the work in the manner provided in this Act. If the judgment of condemnation or of confirmation of the special tax or special assessment levied for the work is appealed from, or stayed by a supersedeas or other order of a court having jurisdiction, and the petitioner files no such election, then the steps provided in this Act for the letting of the contract for the work shall be taken within 6 months after the final determination of the appeal or the determination of the stay unless the proceeding is abandoned as provided in this Act.
70 ILCS 2805/79