A review of the political situation in Australia from the 1970s to the present shows that, while the position of the monarch as head of state has not been altered, some Australians have argued in favour of changing the constitution into a form of republican government that would, they propose, be better suited to the Commonwealth of Australia than the current monarchy. While current official sources use the description "head of state" for the monarch, in the lead up to the republic referendum in 1999, Sir David Smith proposed an alternative explanation, that Australia already has a head of state in the person of the Governor-General, who since 1965 has invariably been an Australian citizen. This view has some support within the group Australians for Constitutional Monarchy. It is designed to counter the objections by republicans, such as the Australian Republic Movement, that no Australian can become, or can be involved in choosing, the Australian head of state. The leading textbook on Australian constitutional law formulates the position thus: "The Queen, as represented in Australia by the Governor-General, is Australia's head of state."