I'm not sure I could, because first of all, there's not sufficient direction in the act. It doesn't say what is meant by being “formed in Canada”. It's not a legal concept. It's a new concept, and it would have to be defined in the act.
The other thing is that I'm not sure of the criteria. The only criteria that comes to mind—and I'm not sure that it's even very useful—is that if the document shows the issuer with an address from another country, then that document should be excluded. But again, you may have, for example, a statement of dividends that is issued by a foreign company for which there is very little reason to doubt that this is a legitimate address on the document.