Originally Posted by
Often1
Practically speaking, if rebooked on UA, the UG will be honored even if space must be forced. If rebooked on a JV segment, the UG will be honored if the agent knows how to do it. If rebooked on anything else, including *A non-JV, the answer is that the UG should not be honored and, if it is, it is because an agent has either made a mistake or gone out of their way to do a favor or the OA has goofed and accepted it.