I think it's important to point out that none of these agreements is ever cast in stone. As I mentioned, there's a common element to almost all free trade agreements that you have the right to withdraw from the agreement with simply a six-month notice. This is not something that we can be assured will last indefinitely. Throughout the course of the 25-year history of the current NAFTA, we've modified NAFTA on many occasions. Going forward, we would expect to continue to make modifications to ensure that the agreement is up to speed.
What the U.S. originally proposed was a six-year sunset after which the agreement would cease. We rejected that out of hand for exactly the same reasons you've identified, that this would provide a high degree of insecurity for businesses that rely on trading back and forth. We now have an outcome where there's a likely 16-year assurance that the agreement is going to remain in effect.