So I have a silly question;
With all these changes happening, especially this latest piece you brought up, how would someone know about this who doesn't have cable anymore (most people nowadays) and had stopped reading the news? I mean I'm sure a lot of the people here only know because of these forums, but let's say one didn't read these, what then? Aren't these banned guns technically still non restricted until you get the notice in the mail stating otherwise? I know ignorance of the law doesn't mean it isn't law but I deal in construction contracts and something isn't official until written notice is provided despite being verbally told. Not going to try anything silly but had to ask what the next step we can expect is.
Asking for a friend...
It's your duty to know the law. The whole "you can't ignore the law" thing doesn't mean "you can't do as you please even if it's contrary to the law", because that's a tautology. What it means is that you can't not know the law. Not having an internet connection isn't a reason to not know the law.
A corollary of "you can't ignore the law" is that the law must be published and accessible. In our system, it means a law has to be published in the official "gazette" to be effective. The OIC was published in the gazette, therefore it affects every person on Canadian soil: citizens, non-citizens, corporations. The FRT is not published anywhere, and therefore can be pretty much completely ignored, legally speaking. Saying "item X is prohibited because the FRT says so" is a complete non-sequitur.
So if you take the SLR as an example, nothing in the OIC is banning them. They are not variant of AR15, are not prohibited by name, don't have bore >20mm, and arguably can't project a bullet with more than 10kj of muzzle energy. So not prohib. If the FRT list them as Prohib, then the FRT is simply wrong, and those who use it should request the correction to be made from those who produce it. If a retailer or distributor has a significant amount of invested money in SLR inventory, they should contact their lawyer to get an legal opinion on whether they can sell them or not.
The reverse is also true. A rifle barreled in 375 Enabler is currently listed in the FRT as NR (as far as I know), but in reality it is prohibited under the 10kj clause. Anyone should obviously have a chat with their lawyers before selling, transporting, or using such a rifle in any way. Regardless of what the FRT says.