OK, I browsed it for all pertinent information, all relevent quotes are included below post.
First off, while the document uses “restricted weapon” a lot, it never defines what it means by that.
Specifically this is the only definition it gives:So a restricted weapon is a any weapon that is defined as a restricted weapon by law.... That is a meaningless phrase, and can tell us nothing about what “restricted weapon” means (unless there is another unmentioned document that gives a better description, or a list of these restricted weapons). Note: there is a list of restricted firearms, but there does not appear to be any for generic weapons, at least none mentioned.
But forgetting that, lets assume we are talking about a generic knife that is neither restriced nor prohibited.
My interpretation of these laws.
A knife is a weapon if you intend it as a weapon or deterrent or it was designed as a weapon.
Which seems to me a bad definition. Personally, I would say it needs "primarily" added to that definition. Any and all hunting or survival knife where designed at least partially as a self defensive or even offensive measure against animals, and a person is a subclass of the animals.
You are not allowed to own any weapon if you own it for a "purpose dangerous to the public peace or for the purpose of committing an offence". I have not idea how the law goes about determining what is "dangerous to the public peace" if it is not an offence. If the purpose is not illegal, then why should it be an offence to do it????
Basically, don't do illegal stuff with your knife, and do not even look like you might if you want to play it safe.
You are not allowed to attend a public meeting (not sure that the legal definition of a "public meeting" is) with a weapon, unless you have a lawful excuse.
Seems like a very specific and easily circumvented law.
You cannot conceal any weapon for any reason.
But, the most important point to make is that a knife is not necessarily a weapon.
Summery, according to the letter of the law:
You can own any knife, sword, etc. (minus a very few specifically prohibited ones).
You can go into public with any knife, sword, katana, 13" long blade Khukri (again, minus the few prohibited ones).
You can only conceal a knife if it is not a weapon.
All survival/hunting/wilderness knives are weapons, at least technically in my opinion (though I disagree with the definition).
So if self defence is legal (will read that thread next), self defence should be an acceptable excuse for owning and carrying non-concealed weapons in public.
Note: there are other sections dealing with Search and Seizure, Disposition, and Certificate of analyst that are not relevent to out discussion at this time.