I think what we've discovered in recent years is that we've seen the difficulty of the multilateral effort to try to move forward on these types of issues. There has not been a sufficient amount of agreement to converge on elements on a multilateral basis that we could include in the agreement. Bilateral efforts have moved more quickly and are now more advanced than the multilateral efforts in trying to achieve those kinds of regulatory understandings.
Now, we're working in both directions. We're trying to advance what we can on regulatory issues at the WTO, but also in various other multilateral fora. It's really a matter of the regulatory issues advancing more quickly in bilateral agreements. We see this not only in the agreement we have with the U.S. and Mexico, but also in the agreement we have with the Europeans on regulatory issues. It's a matter of making the right kinds of judgments about where we can move toward some kind of harmonization and where we need to ensure that we have sufficient freedom to develop our own regulatory requirements.