 After the 1949 election, Bill Spooner was appointed a Minister in the Fourth Menzies Ministry on 19 December, however his term as a Senator did not begin until 22 February 1950.The provision was also used after the disappearance and presumed death of the Liberal Prime Minister Harold Holt in December 1967.The Liberal Party elected John Gorton, then a Senator, as its new leader, and he was sworn in as Prime Minister on 10 January 1968 (following an interim ministry led by John McEwen).