Try this site.
http://www.knifeup.com/new-york-knife-laws/
If you still have questions, call your local police at their non-emergency number. They should be able to help you.
Where can I read up on laws on carrying a pocket knife for protection here in New York?
City bylaws and state criminal code... Or .. Call your local police department and ask
I was going to give you the same link Gator Blu posted. It should tell you what you need to know.
But to throw a little more light on it, here's an article on the subject from the New York Times.
The
top 12 list of the best folding knife brands reviewed here. The most of the
folding knives have on-handed opening easiness and topmost security.