It's too bad I won't be near a computer this weekend, as I'm sure there'll be more posts to debate, but if you go and look at Cliff Stamp's link to the Canadian Criminal Code, any knife that can be opened using centrifugal force is technically a prohibited weapon. I believe, but would like confirmation, that the possession of a prohibited weapon can bring a sentence of up to five years.
Therefore, under this criteria, just about any knife loose enough to be opened under pressure by a thumb, which includes most knives using thumb disks, studs, or blade holes, is loose enough to be flicked open. Among the 15-20 liner-locks and lockbacks I own, I haven't found a single knife I can't flip open via "centrifugal force". This includes Benchmades, Spydercos, Gerbers, and some Taiwanese POS knock-offs.
I have been markedly unsuccessful in flipping open stockman, and SAK type slip-joints with heavy back-springs, but who carries non-locking knives these days?
So, yes, although you can find Benchmades, and Spydercos in the local House of Knives at the mall in Canada, they technically are illegal to possess, but this law is not rigidly enforced. This is simply a way for a police officer to use discretion in "busting you".
Clearly if you're in your car at Banff National Park, with a couple sleeping bags, and a tent in the truck, your AFCK is a camp tool. If the police officer finds it clipped into your waistband, at 2:00 am after a bar-room brawl at closing time, you may need to do some fast talking. It's all about intent up here. Speak politely, always state that your knife is a tool, and you should breeze right by the cops.
Not a great solution, as a cop having a bad day has the potential of putting a severe dent in your future, but this is the law, and is unlikely to be changed any time soon.