> You missed 'warrentless' in your summary. It's sort of important.

Less than you would hope: https://web.archive.org/web/20140718122350/https://www.popeh...

Notably, a single secret warrant authorized the surveillance of everyone on the Verizon network:

That warrant orders Verizon Business Network Services to provide a daily feed to the NSA containing "telephony metadata" – comprehensive call detail records, including location data – about all calls in its system, including those that occur "wholly within the United States, including local telephone calls" - https://en.wikipedia.org/wiki/United_States_Foreign_Intellig...

I know those are about the US and this law is Canada, but the same things can happen.