Transport Canada has been working on a new rule requiring aircraft to be equipped with a 406 MHZ ELT including those aircraft from the U.S. overflying Canadian airspace on their way to or from Alaska. The rule which was originally intended to go into effect on Feb 1, 2009 has gone through a series of delays. In May, 2009, Canada's Transport Minister refused to sign the rule into law and sent it back for revision. In May, 2010, he was reportedly ready sign it into law at any moment with no significant revisions from the previous version. But now, over two years later, nothing further has been announced giving the impression that the matter is stalled for now. I have no inside information about this. The only information available to me is articles that I find on the internet from what I presume to be reliable sources. Here are links to some such articles.