[boyakasha1]

I appreciate your input skittles but I think you're missing the point I was trying to make. I would use this card well after I have used the yes sir, no sir thing with him/her, but I would never admit to anything done wrong. If you admit what you did wrong, you might as well show up to court in a tshirt and baggy jeans because you have no chance either way. I have always been led to understand that you always treat the police with respect, but never admit guilt under any circumstances until you have had time to seek the counsel of a lawyer. You may in fact be telling them how to do their job but remember two things, one their job is to bust your ass (not what YOU want to happen I'm sure), and two they work for YOU. You pay taxes, you're part of this community and they are there to serve and protect all of us; would it not be your right to politely tell them what they can and cannot do with your property?
When I heard of this card, and imagined when I would ever use it, it would most likely be used, in my opinion, when I was being arrested and/or detained and I had nothing more to say until having talked to a lawyer; thus why I would hand over a card instead of opening my mouth. Handing over a card expressing the rights you wish to exercise guarantees that you won't further incriminate yourself.
A piece of paper is no excuse for using your head, but it would never hurt to keep around as a reference tool.
That being said, I don't know if there is one for in Canada but a good place to look would be NORML. I know they are active in Canada as well and if they do not have one, they may be able to help you find one.
Anyhow, just my two cents. Peace