Ok so I think I have some clarification on this.
they appear to be a "controlled" item not a "prohibited item"

and in regard to "controlled" items, Vicpol have the following to say:

"
Controlled weapons are weapons that can be used for legitimate purposes but require regulation because of the possible danger they pose to the community. This category of weapon includes knives that while not considered prohibited weapons, still are a potential danger to the community.
A person must not possess, carry or use a controlled weapon without lawful excuse. Lawful excuse includes:
a) the pursuit of any lawful employment, duty or activity
b) participation in any lawful sport, recreation or entertainment, and
c) the legitimate collection, display or exhibition of weapon.
Lawful excuse does not include for the purpose of self-defence."