65 ILCS 55/8
Any person interested in any real estate to be affected by such assessment, may appear and file objections to such report, by the time mentioned in said notice, or in case of incomplete notice then as specified in the last preceding section, or within such further time as the court may allow, and the court may make such order in regard to the time of filing such objections as may be made in cases at law in regard to filing pleas; but no prior rule need be taken therefor unless directed by the court. As to all lots, blocks, tracts and parcels of land, to the assessment of which objections are not filed within the time aforesaid, or such other time as may be ordered by the court, default may be entered, and the assessment confirmed by the court, notwithstanding objections may be pending and undisposed of as to other property.
65 ILCS 55/8