The regulation of airport noise falls under the Aeronautics Act. It's a federal issue. At the same time, airports are expected to be sensitive to the concerns of the adjoining communities.
One thing I would mention, however, is that depending on where the airport is located within Canada—I'm thinking of Montreal, Toronto, and Vancouver in particular—we are seeing more and more planes arriving or leaving in the middle of the night because they are coming from or going to China or elsewhere in Asia. The business traveller particularly wants to be able to arrive for the next working day in Asia, so the issue of aircraft noise and airport noise is going to continue to be a challenging one.
At the same time, as was noted just now by my colleague from the industry department, with every generation of plane and engine that is developed, one of the considerations is noise abatement and making the engine and plane quieter. Technological changes are evolving, and at the same time, business activity is increasing. There is not going to be a simple answer to your question. There will be the pressure for more planes and more growth. Of course, for local residents it will be a sensitive issue from time to time.