We'd have to propose amendments. If we were to propose amendments to the U.S. and to Mexico, we would have to engage, if they were willing to do so, in a new negotiation to come up with a new balance of concessions among all three parties. I have to say that given the conversations we've had with the U.S., I find it highly unlikely that they would engage in those discussions with us. In fact, in their statement of implementation, they have included a provision which says that they could move ahead alone with Mexico and without Canada if we took too long or were not following what they want.