Illinois State Police FAQ
http://www.isp.state.il.us/foid/firearmsfaq.cfm
The Criminal Code refers to "a case, firearm carrying box, shipping box, or other container." However, the Wildlife Code is more specific, defining case as "a container specifically designed for the purpose of housing a gun or bow and arrow device which completely encloses such gun or bow and arrow device by being zipped, snapped, buckled, tied, or otherwise fastened with no portion of the gun or bow and arrow device exposed."
There is more than one way to legally transport a firearm. However, in order to be in compliance with all statutes, it is recommended all firearms be transported:
Unloaded,
Enclosed in a case and,
By persons who have a valid FOID card.
Now for the kicker
How do I transport a firearm through an Illinois community with an ordinance that prohibits firearms or handguns?
Illinois' Unlawful Use of Weapons law
does not preempt local ordinances from banning firearms. Persons carrying or transporting firearms through such communities could be subject to local firearm ordinances. It is recommended that
you contact local authorities regarding their firearm ordinances.
If a non-resident is coming to Illinois to hunt and would like to bring their firearm, how do they legally transport it ?Non- residents must be legally eligible to possess or acquire firearms and ammunition in their state of residence. It is recommended that, in order to be in compliance with all statutes, non-residents transport all firearms:
Unloaded, and
Enclosed in a case, and
Not immediately accessible or broken down in a nonfunctioning state.