I have a question regarding the MPM Expert Flyer shows and if this means that the routing is allowed by the airline. For example, when I was looking for MPM from NRT to EWR on UA, it shows MPM via the Pacific (8084) and MPM via the Atlantic (12511). Does this mean that both are legal routings for me to use to get from NRT to EWR? I noticed that when I put in FRA-BKK, it only allowed routings EH (Eastern Hemisphere) and TS (via Siberia). I know that FRA-BKK via the Atlantic isn't allowed, so I'm wondering if every time Expert Flyer shows MPM, are they showing a legal routing (as per the airline's rules)? Thanks.