(a) at all times during such show conspicuously post and maintain signs stating "A National Instant Criminal Background Check must be completed prior to all firearm sales or transfers, including sales or transfers of rifles or shotguns". Signs must be posted at all entrances to the gun show, at all places where admission tickets to the gun show are sold and not less than four additional locations within the grounds of the gun show;

(b) notify all firearm exhibitors in writing that a national instant criminal background check must be completed prior to all firearm sales or transfers, including sales or transfers of rifles or shotguns; and

(c) provide access at the gun show to a firearm dealer licensed under federal law who is authorized to perform a national instant criminal background check where the seller or transferor of a firearm, rifle or shotgun is not authorized to conduct such a check by (i) requiring firearm exhibitors who are firearm dealers licensed under federal law and who are authorized to conduct a national instant criminal background check to provide such a check at cost or (ii) designating a specific location at the gun show where a firearm dealer licensed under federal law who is authorized to conduct a national instant criminal background check will be present to perform such a check at cost. Any firearm dealer licensed under federal law who performs a national instant criminal background check pursuant to this paragraph shall provide the seller or transferor of the firearm, rifle or shotgun with a copy of the United States Department of Treasury, Bureau of Alcohol, Tobacco and Firearms Form ATF F 4473 and such dealer shall maintain such form and make such form available for inspection by law enforcement agencies for a period of ten years thereafter. 2. Whenever the attorney general shall believe from evidence satisfactory to him or her that a gun show operator has violated any of the provisions of this section, the attorney general may bring an action or special proceeding in the supreme court for a judgment enjoining the continuance of such violation and for a civil penalty in an amount not to exceed ten thousand dollars. If it shall appear to the satisfaction of the court or justice that the defendant has violated any provisions of this section, no proof shall be required that any person has been injured thereby nor that the defendant intentionally violated such provision. In such action preliminary relief may be granted under article sixty-three of the civil practice law and rules. In connection with any such proposed application, the attorney general is authorized to take proof, issue subpoenas and administer oaths in the manner provided in the civil practice law and rules.