It is, I think, pretty much done arbitrarily. The railways have, under the Canada Transportation Act, the right to issue tariffs, which they do.
There may in some instances be some negotiation and discussion with the railways, to some extent possibly on the level but also on the application. There may be instances when, for example on demurrage, on the surface it may look like demurrage should have covered, say, two days for cars, but there may be some other circumstance that the railway might be willing to recognize was such that there shouldn't be two days of demurrage. It would depend on a case-by-case basis.