(430 ILCS 66/40)
Sec. 40. Non-resident license applications.
(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 in accordance with subsection (b) of Section 65 of this Act.
(430 ILCS 66/65)
Sec. 65. Prohibited areas.
(b) Notwithstanding subsections (a), (a-5), and (a-10) of this Section except under paragraph (22) or (23) of subsection (a), any licensee prohibited from carrying a concealed firearm into the parking area of a prohibited location specified in subsection (a), (a-5), or (a-10) of this Section shall be permitted to carry a concealed firearm on or about his or her person within a vehicle into the parking area and may store a firearm or ammunition concealed in a case within a locked vehicle or locked container out of plain view within the vehicle in the parking area. A licensee may carry a concealed firearm in the immediate area surrounding his or her vehicle within a prohibited parking lot area only for the limited purpose of storing or retrieving a firearm within the vehicle's trunk, provided the licensee ensures the concealed firearm is unloaded prior to exiting the vehicle. For purposes of this subsection, "case" includes a glove compartment or console that completely encloses the concealed firearm or ammunition, the trunk of the vehicle, or a firearm carrying box, shipping box, or other container.