That's a very good question.
There are two areas in which you want to have dispute resolution. One is with respect to the fees or charges. The other, as you noted, is with respect to the level of service.
With respect to charges and fees, for Nav Canada we must implement our charges or change our charges in line with certain charging principles that are contained in the legislation, in CANSCA. They are very, very similar to the charging principles that are in the bill before you. There are, as I say, a few differences, but they are very similar.
The dispute resolution mechanism is an appeal by the customers or by anyone affected to the Canadian Transportation Agency. In the course of our history, since 1996, there have been two appeals. We've been successful on them. We've been very successful, as Ms. Wiebe noted as well, in not raising our charges. In fact, we haven't raised our charges since 2004. We've lowered them four or five times since then, so there hasn't been much of a reason to have appeals.
On level of service changes, there are regulations around that. We give notice of changes in level of service. There are regulations around safety. Transport Canada is involved to make sure that anything we're proposing to do is done in a safe manner. If it's done that way, it's up to the business to decide how best to provide the service to our various customers and stakeholders.