i think you can only carry a folding knife with 3" blade or smaller.Not all of them yet. There is a proposal to ban "some" large knives and machetes.
A long time ago there was some ban passed on "pointy" knives. Chef's knives had to have a blunt tip. In an article from a long time ago some chef on his way to work carrying his professional cutlery in some kind of roll bag got nicked.