A careful and cautious analysis, Mark, but I would like to rebut several points:
What you say sounds good... but now let's look at it from a slightly different standpoint.
[*]The records that CFC/RCMP have show that person "X" purchased an S&W M&P 15-22 rifle along with a magazine that is currently classified as a Prohibited Device.
Yes, "X" owns the rifle and, by inference, at least one magazine. This does not, of course, identify anyone who may own a magazine but not the rifle (dealer, gun show trader, etc.)
[*]Person "X" was notified directly that they are in possession of said Prohibited Magazine and given several options to avoid being charged.
The notification part is fine, though long overdue. Posting a notice on the CFC web site, as they did, was an entirely inadequate response. All that half the guys in my club know about the internet is that their kids buy CDs on something called eBay.
[*]Person "X" was asked to show evidence that they have complied with one of those options.
As has been noted before, this is an absurd demand since it is impossible to prove a negative. Many people, including me, had more than one magazine. Establishing that one was pinned or destroyed proves nothing about the others.
[*]While the RCMP may not have legal grounds for "forcing" Person "X" to send a copy of the evidence tag showing the magazine was turned into police for destruction, they would have grounds, (based on the previous information and their "belief" that Person "X" still has possession of the Prohibited Magazine) to obtain a warrant to search Person "X's" home, etc. for the Prohibited Magazine or evidence thereof.
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So... RCMP come to your door with a warrant and tear your place apart looking for a magazine that may or may not exist... when all you needed to do to avoid that was supply them the evidence tag? Who knows what else the "find" while doing their search?
Personally, I don't need that kind of pointless confrontation... or the damage that would occur during such a "search".
Frankly, I find this a rather breathtakingly submissive attitude. You say: A police agency can make an extra-legal, or possibly illegal, demand (and one which can prove nothing, as noted above) and we should comply or expect the door to be broken down at midnight. Last time I looked Canada was not run by jackbooted bureaucrats and we should do nothing to encourage that development.
Suit yourself... make a point if you really believe it's necessary... but don't be surprised when the other side makes a "point" right back at you.
There are several points that can be legitimately and constructively made, regardless of whether an owner sends them the bogus "evidence." To wit:
a) The RCMP should have made the proper classification decision initially. They had an evaluation rifle for months. Do you think it came with a special "Safe for Children" 10 round magazine?
b) Having decided months after sales commenced that the magazine should be prohibited, they should have notified owners immediately so as not to expose them unwittingly to criminal prosecution.
c) That notification, when it did come a year later, should not have included a heavy handed threat to invoke police agencies. We are talking about a government interface with law abiding citizens here, not criminals.
d) Compensation should have been offered, as per the Norinco T97s, for the financial loss of owners/dealers.
e) The process for tracking the disposition of the magazines is obviously deeply flawed. First of all, it is literally impossible to establish a negative and secondly, their own staff have been giving confusing, contradictory and ridiculous instructions to people who call in.
f) The entire issue is fundamentally trivial and involves no public safety dimension. Spending more time and money on it is a waste of public resources.
g) The issue arises from a regulatory framework that is ambiguous, irrational, ineffective and which engenders disrespect for the law.
It's taken many many months for those "letters" to go out to registered owners... you don't think that the government lawyers/crown attorneys haven't had input on the best way to deal with the situation?
We'll never know, but I doubt it. Any attorney would have instantly recognized the absurdity of the process they have developed. I think it was a hastily cobbled together CYA operation set up to avoid closer scrutiny by their political masters who were concerned by complaints about the lack of notification.