I don't doubt the the UA PWA doesn't specifically allow for use of outside transport. Doesn't mean it could not have been considered; part of the next amendment negotiations; or, while not addressed, it could have been used out of the box. Have to look at the PWA. Certainly, a process with standards of service could be agreed on. Yes, I was on an MEC, so familiar with contracts. And, presently I audit and vet charter operators for high wealth people world-wide.