sentences:  He arrived and departed at Tullarmarine Airport in Melbourne aboard a RAF VC10.In the 1980s the Queen made short tours to open the new High Court of Australia building in 1980 as well the City Square in Melbourne, then again to open the new National Gallery of Australia in 1982 and the Parramatta Stadium in 1986.During the 1986 visit, at a ceremony held in Government House, Canberra, she signed a proclamation that brought into effect the Australia Act 1986, which severed the final constitutional link between Australia and the United Kingdom.