In short, a caretaker government was enacted. The leader of the Country Party: John McEwan was sworn in as caretaker Prime Minister until Holt’s Party chose a new leader, as per the Westminster system. Under a caretaker government there are certain protocols and restrictions to be followed. McEwan served as caretaker PM from 19 December 1967- 10 January 1968. When John Gorton was chosen by the Liberal Party as their leader, and therefore Prime Minister. Thereafter it was business as usual for the most part, Gorton choosing to continue most of the Liberal party’s original policy plan.

I recommend checking out the National Australian Archives for access to primary sources such as police reports, cabinet minutes, and personal papers.