Context of the map:
Illinois's ban on open and concealed carry was ruled UnCon by Fed court.
The execution of that court's decision is delayed until July 9th now.
This unusual behavior by the court has left Illinois in legal limbo. The Law is on the books, decided its UnCon, but that decision is not in effect. Theoretically, one can be arrested for the felony of CC, but then file for motion to dismiss on same grounds as Moore (and appeal all the way up to the necessary level if you don't get the dismissal).
Due to the awkwardness and politics of this transition period, some State's Attorneys and Sheriffs have taken it upon themselves to publicly declare they will NOT enforce the concealed carry ban until a transition law is passed or the legal landscape otherwise changes.
This map shows which counties have made a declaration one way or another.