I think I should just note a couple of points, if I may.
One point is that the rules system is somewhat in place because the rail industry in Canada, and in the U.S. for that matter, is not part of an international regime that sets international regulations, etc. This is something that is a little bit different from our other transportation modes, and there is, I think, a reason why the operation of those very complex types of details of operation come forward from the industry. They must be approved by Transport Canada. If we aren't satisfied with them, we will direct them to make amendments, and that's happened in a number of cases.