10 of those are royalty who have been appointed to the rank in a ceremonial capacity, including Queen Sirikit of Thailand, the Duke of Edinburgh, the Prince of Wales and the current head of state of Malaysia. In the case of Malaysia, the elected Yang di-Pertuan Agong is appointed a Marshal of the Air Force for his tenure as head of state, but relinquishes the rank after completing his term in office. He can, however, be re-appointed to the rank if he later serves another term.