65 ILCS 5/9-2-141
After the expiration of the 30 day period allowed for filing a notice of appeal under this Division 2, an appeal from any such judgment may be filed in the manner provided in other civil cases on petition or application of owners or parties interested in the property affected thereby, as shown by the record, at any time after the disposition of the last remaining objections to the confirmation, if any, prior to the first day of June following the entry of the judgment.
However, if the warrant for collection as to any parcel is not certified for collection so that an application for judgment of sale may be made in the year following the entry of the judgment, leave to appeal as to that parcel, on application, may be granted by the reviewing court within the period of one year after the entry of the judgment.
In every case there shall be filed with the clerk of the reviewing court, with the application for leave to appeal, an affidavit by the appellant or his agent setting forth the time when the warrant for collection, as to the property, was so certified, and further setting forth that the person to whom the notice of the filing of assessment roll as to the property, as shown by the record, did not receive the notice, or otherwise learn of the pendency of the proceedings for the confirmation of the assessment until less than 10 days before the entry of default against his property in the court below. In all such cases the notice of appeal shall contain a statement that it is filed pursuant to leave granted by the reviewing court under authority of this Division 2 and the notice of appeal shall be filed and served on or before the dates hereinabove fixed.
65 ILCS 5/9-2-141