Shall there be an amendment to the Colorado Revised Statutes concerning a requirement that background checks be conducted on prospective firearms transferees if any part of the transaction occurs at a gun show, and in connection therewith, directing that a gun show vendor require a background check on a prospective transferee and obtain approval of the transfer from the Colorado Bureau of Investigation; defining a "gun show vendor" as any person who exhibits, offers for sale, or transfers a firearm at a gun show; requiring gun show promoters to arrange for the services of federally licensed gun dealers to obtain background checks at gun shows; prohibiting the transfer of a firearm if a background check has not been obtained by a federally licensed gun dealer; requiring record keeping and retention by federally licensed gun dealers who obtain background checks; permitting federally licensed gun dealers to charge a fee of up to ten dollars for conducting each background check at gun shows; requiring gun show promoters to prominently post notice of the background check requirement; establishing criminal penalties for violations of these requirements; exempting transfers of certain antique firearms, relics, and curios from the background check requirement; and requiring the appropriation of funds necessary to implement the measure?