A governor-general may be recalled or dismissed by the monarch before their term is complete. By convention, this may only be upon advice from the prime minister, who retains responsibility for selecting an immediate replacement or letting the vacancy provisions take effect. No Australian governor-general has ever been dismissed, and it is unclear how quickly the monarch would act on such advice. The constitutional crisis of 1975 raised the possibility of the prime minister and the governor-general attempting to dismiss each other at the same time. According to William McMahon, Harold Holt considered having Lord Casey dismissed from the governor-generalship, and went as far as to have the necessary documents drawn up. Casey had twice called McMahon into Yarralumla to give him a "dressing down" over his poor relationship with Deputy Prime Minister John McEwen, which he believed was affecting the government. Holt believed that this was an improper use of his authority, but no further action was taken.