If the list is merged before the contract is completed, then they would have to. If the list merger happens after the contract is signed, then the rates would have to be determined via arbitration just as the current -900 rates are being arbitrated. Or, the MEC could simply choose to negotiate the rates before the merger just to get it out of the way. That comes down to whatever they think will be the smarter strategy for getting the best rates. I could go either way on that. There are pluses and minuses with either route.