N.Y. General Business Law § 897
* 1. A national instant criminal background check shall be conducted and no person shall sell or transfer a firearm, rifle or shotgun at a gun show, except in accordance with the provisions of 18 U.S.C. 922(t). * NB Effective until September 12, 2019 * 1. A national instant criminal background check shall be conducted and no person shall sell or transfer a firearm, rifle or shotgun at a gun show, except in accordance with the provisions of 18 U.S.C. 922(t), provided that before delivering a firearm, rifle or shotgun to any person, either (a) the National Instant Criminal Background Check System (NICS) or its successor has issued a "proceed" response to the seller or transferor, or (b) thirty calendar days shall have elapsed since the date the seller or transferor contacted NICS to initiate a national instant criminal background check and NICS has not notified the seller or transferor that the transfer of the firearm, rifle or shotgun to such person should be denied. * NB Effective September 12, 2019