Long Island is better than NYC BUT Nassau has many former NYC officers and Suffolk some too. They were all trained in the NYC way of enfocing the NY STATE law, and one of my son's teen age friends was threated with arrest for a flickable knife ( the officer took it), and I saw an teen arrested at Broadway Mall ( Nassau) for a "gravity knife" with no other charge. In NY it is best to have a non flickable knife that is not weapon like by design. The term "dangerous knife" is tied to intent of use. If you state you're carry it for a weapon ( including self defense) then it becomes a dangerous knife. A knife with a tanto blade or dagger blade may also be considered a dangerous knife. Finally anything carried with the design of a weapon will get you arrested by state law if the officer feels so inclined. You may never have an issue, but you never know. It is best to error on the side of following the law, especially in today's world where an arrest will follow you around forever ( no matter what happens in court), and even stops by police often get your name in a data base that is out there for some to see. The NYPD has been sued for this, but they still do it for now....My final comment is to keep your knife out if sight anywhere in NYS. NYC law requires this, but anywhere in NYS this can be a great help if you are charged with a illegal knife. Most weapons charges are dropped due to the officer not being able to properly explian why he search you in the first place. If your knife is clearly visible ( clip or belt sheath) then the officer can ask to see if it is legal with you have no Forth Amenedment rights .....