Please note the following, published by the ISBA today:

Illinois Supreme Court amends Rule 23 to allow citation of unpublished appellate court rulings
Chief Justice Anne M. Burke and the Illinois Supreme Court announced the amendment of Rule 23, which will allow litigants to cite unpublished opinions from the Illinois Appellate Courts for persuasive purposes.

Amended Rule 23 is effective Jan. 1, 2021.
The Bar News