Certainly. The Calgary airport has been in its existing location since 1937. The city was but a distant cluster of homes and businesses quite far away. What happened is that the city grew around the airport over a period of time. One thing that has been extremely helpful in Alberta—and it's a unique Alberta phenomenon—is the airport vicinity protection area. That was put in place in 1972, I think. Effectively, it looked at those noise exposure forecasts, based on aircraft at the time, in 1972, and said that any kind of residential development of any significance—schools, places of worship, those kinds of things—should not be built here.
So yes, the city is built around it, but unfortunately, even with those noise exposure forecasts.... The noise exposure forecasts are very beneficial, because they forced the municipality, if it wishes to build there, to work collaboratively with the airport. Unless the municipality and the airport agree, the legislation, which is provincial, will override. That's a real plus.
Having said that, we have not moved those noise exposure forecasts since 1972. The reality is that, while aircraft have gotten quieter, we've had much densification around the airport. The challenge is, even with great legislation.... The important thing, realistically, is a set of acoustical standards that will make sense for homes that are built on flight paths. That's something we're working on with the municipality right now. I don't think we'd have the opportunity to do that if we didn't have what we call the vehicle or the tool of the airport vicinity protection area.