 Kenney preferred to have Bostock in command, and while he regarded the antipathy between Jones and Bostock as a nuisance, was happy to leave arrangements the way they were.However, Kenney deviated from the normal structure of an air force by creating the Advanced Echelon (ADVON) under Whitehead.The new headquarters had the authority to change the assignments of aircraft in the forward area, where fast-changing weather and enemy action could overtake orders drawn up in Australia.