Let me speak to the two things.
Number one, with regard to the jurisdictional issue—and I guess I'm a bit mystified because it already exists in the Aeronautics Act, and has existed for 40 or 50 years, and has not resulted, the last time I checked, in any major federal-provincial issues. This is a matter, in our view, of public safety. We think there are some obligations on the part of the federal government in that context. We don't think this would be in any way an onerous intrusion into provincial jurisdiction.
With regard to the 300 metres, we recommended 300 metres because in our work on proximity issues—noise, vibration, a whole range of other issues—that seems to be the standard that has emerged through practice and through other studies that have been done. If you're outside that kind of range, then it's highly unlikely that you're going to have anything impactful either way. If you're in that range, it's possible.
I should also say that just because a municipality sends a piece of paper saying we're giving notice, it doesn't necessarily mean that this triggers a big process. Right now, there are hundreds and hundreds of notices given every week to airports across the country, and most of them are of little or no consequence. But the few that are of consequence are important.