Hi Seth, To the best of my understanding the NYS Senate and asembly were shown a true gravity knife back in 1958 when the ban was passed ( and the Federal law then a year after). The lawmakers where shown a true gravity knife and given the wording to describe it that exist today. A true gravity knife is "release" from the handle or sheath by simplying the force of gravity when pointed down after a lever or button has been pressed in order to "release" the blade so that the gravity allows it to fall free from the handle. Some knives required an additional "thrust" in order to make the knife open. This is the basis of the centifical basis wording. The blade dropped out of the top of the handle or sheath and did not swing out from the side. For about 15 years after the law was passed there were few if any arrest made for a locking knife that was side opening and could be flicked open. In the mid 1960s there was a change in how this law was interpeted by the NYCPD. It was felt that any knife that locked open and could be "flicked" open from the closed postion was now a gravity knife. This has been now streched to include holding of the blade and flick the handle open since the law is vague enough to allow this also. The only hope is the word "released" which somewhat implies that it is not just swung open, but the courts have not seemed to value this point of view, and have allowed the present understanding of the law to stand. The only possible defenses is that the federal law is worded the same way ( in fact I believe it does not require that the blade locks and is therefore even more inclusive), and the Federal goverment has had several cases mostly reguarding butterfly knives questioning the defintion of a gravity knife. There have never been a Federal interpetation that would allow for a standard folding knife that could be flicked open to be classified as a grvity knife. US Customs has had the most experience enforcing the Federal law and has never banned a loose bladed knife that could be flicked open from import into the US.
I think you could also set forth that stores and retailors on the internet sell "flickable" knives all the time with no restrictions, and that when our present Gov was the State AG he went after out of state dealers of switchblades, stun guns, etc but NOT flickable knives.....