I'll go back to Mr. Rubinstein. Of course in the prairies, we've tested the hauling of grain and commodities related to the agriculture industry, but with the Bakken oil exploration, they've now used some of those same lines not only for hauling grain but for hauling Bakken oil.
What do you do in terms of your certificate of fitness for those rail lines and how have you changed the coverage when that type of change takes place?