In setting up an intinerary ex-MRU, I have received the following message from the BA office there.

"AS PER FARE RULES THE SURFACE BETWEEN CMB AND NRT
IS NOT PERMITTED TAKING IN CONSIDERATION THE FACT THAT CMB
IS IN THE INDIAN OCEAN AND NRT IN PACIFIC OCEAN."

Question: I know of the trans-atlantic and trans-pacific rules but did not know of this constraint. Is this actually in violation of the rules? (Incidentally, I was planning to use some segments of another RTW between NRT and CMB).

Also for general planning information ex-MRU, note that the JNB-MRU does not yet seem bookable as per the message today:
"PLEASE NOTE THAT THE SECTOR JNB/MRU ON BA6399 IS NOT YET
PUBLISHED IN OUR SYSTEM"