I would say that it can be invoked, but the question then becomes one of how effective that would be.
If you look at existing legislation like the Canada Health Act, which was referred to earlier, that would be a way of setting national standards, and if that wasn't powerful enough, you could resort to the Emergencies Act to set some basic national standards, including the requirements on dosing, and that's been subject to a great deal of scientific discussion.
Our state of knowledge, of course, is imperfect, but assuming a situation where our state of knowledge would have been better, then it would have been possible to set some standards. However, to take direct action would be extremely difficult because of the need to basically work through the provinces and territories.
You can invoke police powers but then you would rely upon provincial and municipal police to enforce those powers; you could not do it solely through the RCMP. All I said was, yes, it can be done, and I think the power is there to do it, but would it be effective? As the earlier speaker, Dr. Attaran, said, I would say it's maybe one of the less effective ways to approach this.