Self-defense with an edged tool can be a sticky issue, but what if a string needs cutting or other non-human object needs slicing? Belt on the wrong kind of knife and you could get booked for Criminal Possession in the Fourth Degree. For those of you concerned with staying legal, use our poster of tips for the trickier rules in the NY Penal Code and NYC Administrative Code. Also, when measuring up your blade, be sure to do so with the downloadable PDF version as that is to scale.