It is unfortunate that New York is indulging in irresponsible application of a non existent law.
Canada is slightly different in some respects.
The Criminal Code specifically states that gravity, mechanical activated, punch knives, etc are deemed prohibited weapons.
There is much rumor about a rule of thumb utilised by the police that a knife must have a 3" long blade or less. However, this is just a rule of thumb. As Canada is comprised of such diverse regions it would be almost impossible to enforce.
Here is some of what I have learned or discovered over the years in Canada:
1) Do not behave like a fool. Always conduct yourself as though you are being watched. If you do not act irresponsibly there is no reason to believe you are a threat.
2) Respect those spaces not your own. On more than one occasion I have wondered onto a site where the floor manager has requested that I surrender my utility knife (to pickup later) or do not bring it into the space. Although inconvenient, I do my best to comply.
3) Your knife must be on display (in my case attached to my belt on the right side). LEO(s) must be able to see it otherwise it will deemed a concealed weapon.
4) Don’t bring a machete to an urban area, unless you are chopping down vegetation. The police take a dim view of this.
5) Finally, if the LEO attending a scene deems that the knife constitutes a threat you must surrender it.
I forgot, this is my first post. Hello everyone.
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They will swing back to the belief that they can make people...better. And I do not hold to that. So no more runnin'. I aim to misbehave.