Australia's first Commonwealth Police Force was short lived - surviving only two years between December 1917 and 1919 being set up following an altercation between the then Prime Minister of Australia, William Morris (Billie) Hughes and a heckler at a rally in Queensland after local police sergeant declined to become involved 'in a Federal matter'. In later years discussions between Commonwealth government and state authorities resulted in the birth of the Commonwealth Investigation Service - a plainclothes unit with the responsibility of conducting investigations into specific breaches of Commonwealth legislation. The early 1930s saw the formation of the Peace Officer Guard with the aim of protecting Commonwealth property and interests. The Peace Officer Guard (POG) operated at such establishments as munitions factories, research facilities and certain Commonwealth Government departments. The Australian Security Intelligence Organisation (ASIO) came into existence in 1949, absorbing some of the functions of the Commonwealth Investigations Service and assuming new areas of responsibilities. The Commonwealth Police was re-formed in 1960, absorbing both Peace Officer Guards and Commonwealth Investigations Service officers. In 1975 the most ambitious plan to restructure Australia's national police service was attempted by the Commonwealth Government. An amalgamation of Commonwealth Police, Northern Territory Police and Australian Capital Territory Police forces, Department of Customs and Excise and Special Reports Branch of the Department of Immigration would have produced the "Australia Police". However, the amalgamation was abandoned later the same year following a change of Government. The bombing of the Hilton Hotel in Sydney during the Commonwealth Heads of Government Meeting (CHOGM) on 13 February 1978 prompted the Federal Government to commission an inquiry into Australia's national police service by former London Metropolitan Police Commissioner, Sir Robert Mark. As a consequence of this inquiry, on 19 October 1979, the Commonwealth Police and the Australian Capital Police Forces were amalgamated to form the Australian Federal Police which, shortly after, was expanded to assume the functions of the former Narcotics Section of the Bureau of Customs.