Very good read: The Facts about Gun Shows...
not related specific piece of legislation but speaks to both Federal and State legislation.
The Facts about Gun Shows | David Kopel | Cato Institute: Daily Commentary
FWIIW, I have a great respect for both David Kopel and the Cato Institute.
The Facts about Gun Shows
by David Kopel
This article appeared on cato.org on January 10, 2000.
Gun shows are huge gathering points for people who are interested in Second Amendment issues. Gun rights groups frequently set up booths at gun shows to distribute literature and recruit members. Gun shows are places where Americans properly exercise their First and Second Amendment rights, and neither gun show patrons nor vendors deserve the mean-spirited campaign of abuse to which they have been subjected.