C.R.S. § 18-12-503: Gun show vendors - federal firearms license and state firearms dealer permit required - penalty.

(1) (a) A gun show vendor must be a federal firearms licensee and hold a valid state firearms dealer permit. A person who is not a federal firearms licensee and does not hold a valid state firearms dealer permit shall not participate in a gun show as a gun show vendor.

(b) A person who has been convicted of a second offense of unlawful gun show vendor activity described in section 18-12-505 shall not participate in a gun show as a gun show vendor.

(c) A person who has not completed the certification to the gun show promoter described in section 18-12-504, including attaching a copy of the vendor's federal firearms license and state firearms dealer permit to the certification, shall not participate in a gun show as a gun show vendor.

(2) A person who violates this section commits unlawful participation in a gun show as a gun show vendor. Unlawful participation in a gun show as a gun show vendor is a class 2 misdemeanor; except that a second or subsequent offense is a class 1 misdemeanor.