http://www.nypost.com/p/news/local/suit_sticks_it_to_manhatt...
I also think there is a restriction that pertains to open carry versus concealed (even if concealed means a spyderco clipit hanging inside your pocket).
http://public.leginfo.state.ny.us/LAWSSEAF.cgi?QUERYTYPE=LAW... seems to indicate that gravity knives are legal but perhaps there are other laws that apply. http://www.akti.org/action/new-york-city-knife-code doesn't seem to indicate any others though.
http://www.nypost.com/p/news/local/suit_sticks_it_to_manhatt...
I also think there is a restriction that pertains to open carry versus concealed (even if concealed means a spyderco clipit hanging inside your pocket).