I appreciate that, because the question of phasing out points to the question of where we phase to, if we don't have a new standard. Clearly, if the old DOT-111s are inadequate entirely and the newer DOT-111s have deficiencies, then we have to arrive, especially with our American partners, at what a new standard would be so that we have a comprehensive solution as to where to point the phase-out.
Once that standard is in place, I think we can predict more accurately what the phase-out period will look like.