 Jones' role, in contrast, was primarily administrative, that of "raising, training and maintaining" the service.Though the CAS was "de jure" head of the RAAF, Jones' new rank of air vice-marshal was the same as Bostock's.In the words of Air Force historian Alan Stephens, "Jones was the head of his service, but he was neither unambiguously its senior officer, nor presiding over a unified command ...