Here is the guidance:
This is from: Chicago PD: http://directives.chicagopolice.org/dir ... 1f83d.htmlPursuant to 430 ILCS 66/40(e), nothing in this Act shall prohibit a non-resident from transporting a concealed firearm within his or her vehicle in Illinois if the concealed firearm remains within his or her vehicle and the non-resident:
1. is not prohibited from owning or possessing a firearm under federal law;
2. is eligible to carry a firearm in public under the laws of his or her state or territory of residence, as evidenced by the possession of a concealed carry license or permit issued by his or her state of residence, if applicable; and
3. is not in possession of a license under this Act. If the non-resident leaves his or her vehicle unattended, he or she shall store the firearm within a locked vehicle or locked container within the vehicle.
EXCEPTION:
A non-resident who satisfies the above conditions may carry a concealed firearm in the immediate area surrounding his or her vehicle only for the limited purpose of storing or retrieving a firearm within the trunk of the vehicle.