In a lecture on "An Australian Head of State: An Historical and Contemporary Perspective", published as
Papers on Parliament No. 27, March 1996, Smith mentioned that, in a previous lecture, Senator
Baden Teague had spoken of the Queen as Australia's head of state and argued for her replacement by an Australian head of state, and that in his replies to questions after the lecture Teague had spoken of the Governor-General as "our head of state". Smith remarked that the switch from Queen to Governor‑General was "entirely automatic and unselfconscious", and that Teague was "not alone in his ambivalence". After mentioning other public references made to the Governor-General as head of state, Smith opined "The fact is that under our Constitution we have two heads of state—a symbolic head of state in the Sovereign, and a constitutional head of state in the Governor-General", and said that in his lecture he would discuss the roles of the Sovereign and of the Governor-General under the Australian Constitution, including some of the changes which had occurred in each of those roles since Federation. To conclude the lecture, Smith quoted the remarks of
Sir Gerard Brennan,
Chief Justice of Australia, on the oaths of allegiance and office: After retiring from public service, Sir David became a member of
Australians for Constitutional Monarchy and frequently gave addresses on constitutional matters. He strongly defended Sir
John Kerr and was highly critical of
Gough Whitlam. In 2005 Smith published an account of the events of 1975 and the other constitutional debates,
Head of State, which was launched by former Governor-General Bill Hayden. Smith later published his opinion that the dismissal had been the culmination of a political and not a constitutional crisis. ==Governor-General as head of state==