(720 ILCS 5/24‑1) (from Ch. 38, par. 24‑1)
(Text of Section from P.A. 94‑72)
Sec. 24‑1. Unlawful Use of Weapons.
(a) A person commits the offense of unlawful use of weapons when he knowingly:
(4) Carries or possesses in any vehicle or concealed
on or about his person except when on his land or in his own abode or fixed place of business any pistol, revolver, stun gun or taser or other firearm,....
Check local ordinances which may be more restrictive.
Transporting the firearm from your residence to business the fiream must be unloaded and in a case.