The Australian Defence Organisation (ADO) is composed of the armed forces of the Commonwealth of Australia, the Australian Defence Force (ADF), and the Australian Public Service government department, the Department of Defence which is composed of a range of civilian support organisations. The Chief of the Defence Force (CDF) leads the Australian Defence Force and the Secretary of Defence leads the Department of Defence though both jointly manage the Australian Defence Organisation under a diarchy, and both report directly to the Minister for Defence. The highest active rank in the Australian Defence Force is reserved for the Chief of the Defence Force. This is a four-star rank and the CDF is the only Australian military officer at that level. As a result of the diarchy, the Secretary of the Department of Defence is of the equivalent civilian four-star level in the Senior Executive Service of the Australian Public Service. Command and Control The Commander-in-Chief of the Australian Defence Force is set out under Section 68 of the Constitution of Australia, stating "the command in chief of the naval and military forces of the Commonwealth is vested in the Governor-General as the Queen's representative". In practice, the Governor-General is the ceremonial head of the Australian Defence Force and command and control power is delegated to the Prime Minister and the Minister for Defence. The National Security Committee of Cabinet also plays an important role in the strategic direction of the Australian Defence Organisation including directing overseas deployments and going to war. Five-star level Currently the five-star level is not an active serving rank in the Australian Defence Force. Australia has only had one active serving five-star rank officer within the armed forces of the Commonwealth of Australia. This was Sir Thomas Blamey who was appointed Field Marshal in the Australian Army in 1950 and presented his field marshal's baton by the then Governor-General William McKell. Blamey was seriously ill at the time and died three months later. Until his death, His Royal Highness Prince Philip, Duke of Edinburgh held the ranks of Field Marshal, Admiral of the Fleet, and Marshal of the Royal Australian Air Force. He was appointed to each rank on 2 April 1954. His Majesty George VI was also appointed Marshal of the Royal Australian Air Force, maintaining the rank from 2 June 1939 until his death on 6 February 1952. Four-star level In the Australian Defence Force,