I think I'd echo what Mr. Shepherd has said. We understand those risks that Bill has pointed out. They are real. The retrospectivity is in the running rules. Perhaps we're naive, but we think the working committees and the technical committees that are proposed can in fact work positively to overcome some of those.
This is a negotiated settlement. It was never going to be perfect. In fact, we have often said that in some ways it had to be a lose-lose for both sides for it to be accepted, so it was not going to be perfection from a Canadian perspective or a U.S. perspective.