35 ILCS 200/21-120
In all cities, villages and incorporated towns in counties with 3,000,000 or more inhabitants, separate advertisements may be made giving notice of an intended application for judgment and for an order of sale on account of delinquent special assessments at any time after the first day of August after the special assessments have become delinquent. The procedure in that case is to be in all other respects, except as to the time of making advertisement and application for judgment and sale, the same as in the case of delinquent general taxes. There shall not be included in the advertisement and application for judgment and sale provided by this Section any properties which are included in the advertisement and application for judgment and sale under Section 21-145.
No advertisement or publication may include parcels for which, under Section 14-15, certificates of error have been executed by the county assessor, or by both the county assessor and board of appeals. In the absence of notice under Section 21-135, or the absence of publication under this Section, the court shall retain jurisdiction to enter final judgments sustaining the assessor's objection on certificates of error. However, the court shall provide for publication and mailing prior to the entry of a final judgment in any case in which the assessor's objection is denied.
The provisions of this Section relating to the time when the Collector shall advertise intended application for judgment for sale are subject to modification by the governing authority of a county in accordance with the provisions of subsection (c) of Section 21-40.
35 ILCS 200/21-120