Electoral Act 1918. A joint sitting of the federal parliament would still be used to fill a casual vacancy in the representation of any external territory, in the event that such a territory ever gains separate Senate representation. Special commemorative joint sitting On 9 May 2001, the Parliament met in a special joint sitting at the site of the 1st Parliament, the Royal Exhibition Building in Melbourne, to commemorate the Centenary of that event specifically, and the Centenary of Federation more generally. The joint sitting was addressed by the Governor-General, Sir William Deane. Secret meetings During World War II, the Parliament met in secret on a number of occasions, to hear confidential reports on the progress of the war. There is no Hansard record of the proceedings. Both Houses met in secret joint sittings on 20 February 1942, 3 September 1942, and 8 October 1942. The House of Representatives met in secret on 13 December 1940, 29 May 1941, and 20 August 1941. General Douglas MacArthur is sometimes reported to have addressed the Parliament during World War II. If he addressed the secret joint sittings, this was not officially recorded. However, General MacArthur was provided with a seat on the floor of the House of Representatives on 26 March 1942, and addressed members of Parliament from outside the chamber later that day. Addresses by invited guests The first address by an invited guest to the Parliament in a formally convened joint sitting of which there was an official record was on 2 January 1992, by the US President, George H. W. Bush. Later addresses to joint sittings were from US presidents Bill Clinton (1996) and George W. Bush (2003); and paramount leader of China Hu Jintao (2003). (George W. Bush's and Hu Jintao's addresses occurred on consecutive days in October 2003.) Subsequently, the Senate Standing Committee on Procedure and the Senate Standing Committee of Privileges both recommended that the practice of formally convening a joint sitting for these purposes be discontinued, as they had no constitutional authority, and there were doubts about the validity of the presiding officer of one house giving instructions to members of the other house. On 2 March 2006, it was agreed that future addresses by invited dignitaries would be to a meeting of the House of Representatives only, but to which the members of the Senate would be invited as guests. List of addresses Source: