you would fall under the new contract language, since you would be hired after April 1, 2008. That is if you quit and got re-hired!
Which means would drop to the 90% rate which sucks....
If you are already have some time in, the best way is to wait, or as some have mentioned before, about only after your laid-off then you have the opportunity under Article 5-5 ( Work Opportunity) to follow your work. The only catch to this is, lets say you were to get laid off at your terminal, but the terminal you are wanting to go to is not in a hiring mode, then you would not be allowed to transfer into that terminal. But if they are in a hiring mode, then you would be allowed to transfer, and go to the bottom of the board, at that terminal; but maintain all your company time. You also have to pay for any moving related expenses.