735 ILCS 5/2-207: Period of Publication - Default.

The notice required in the preceding section may be given at any time after the commencement of the action, and shall be published at least once in each week for 3 successive weeks. No default or proceeding shall be taken against any defendant not served with summons, or a copy of the complaint, and not appearing, unless the first publication be at least 30 days prior to the time when the default or other proceeding is sought to be taken.