70 ILCS 605/5-22
When it appears to the commissioners that by reason of omission, mistake, irregularity or improper or insufficient notice or for any other reason not affecting the merits of the assessment, land or other property in the district subject to an assessment has been omitted from an assessment roll, or an assessment has been annulled or held not legally made or is invalid as to one or more tracts of land or other property situated in the district, then the commissioners may petition the court praying that the defects be cured and that an assessment be levied against such lands. The petition shall describe the land or other property sought to be assessed, state the amount of the benefits, if any, assessed against such land or other property, and recite the omission, mistake, irregularity or defect which annulled or invalidated the assessment. Upon the filing of the petition, notice shall be given to the owners of the land or other property sought to be assessed and proceedings had thereon as in other assessment proceedings under this Act. Any such owner may demand that the issues be tried before a jury as provided in this Act.
70 ILCS 605/5-22