I am familiar with those guidelines. However, I have been told get a CC if you want to carry a firearm in the car...BTW, I have taken and passed the IL CC class.
IF don’t want to take class, then be smart...follow the guidelines I suggested.
Apparently firearm was accessible as it was in the car. My guess is it was reachable be driver or passenger in front seat... If it was unloaded and cased or disassembled, then there would not be an aggravated weapon charge.
They were ignorant and foolish to be at airport this week with firearm in vehicle. Oh and did not help to add a pressure cooker for the weekend of the Chicago Marathon and an AR-15...