The law is clear on issues such as trigger locks not required in a safe, vault or room specifically designed...blah blah blah.
What is not clear is the legal definition of a safe, but cabinets are mentioned as not being a safe in the legislation. So it might be safe to assume a cabinet is not a safe since they are separately mentioned.
I would lean towards how that particular storage option is marketed. They are usually clearly marked as a safe or a cabinet.
Yes, there is one provincial court example of a cabinet being considered a safe but that may not help anyone in any other province unless you have really deep pockets for lawyers. And even if it does make a difference the crown may push it further since they have deeper pockets(because they include yours).
Another thing missing is what constitutes a room specifically designed.....try asking the CFO, the RCMP or your local police that one....I guarantee you will get a different answer every time.
I am going to assume that those areas are grey and open to interpretation by whomever it may concern, you, the CFO, the RCMP or your local police.
So again this maybe an issue dependant on the size of your wallet.