"In what instance in the past has the Governor-General used his powers?"

As the Queen’s representative in Australia, The Governor-General has two types of power; executive power and reserve power. The Governor-General regularly exercises (uses) their executive powers but rarely exercise their reserve powers.

The Australian Constitution gives the Governor-General executive power. This power includes giving Royal Assent to laws passed by the Australian Parliament and starting the process for a federal election. The Governor-General exercises these powers on the advice of the Prime Minister and ministers, who have day-to-day responsibility for governing Australia.

The Governor-General’s reserve powers are not included in the Constitution. They come from the authority of the Queen, who the Governor-General represents. The only guide to these powers is convention (tradition). This means the exact nature and scope of these powers is arguable.

The Governor-General’s reserve powers are generally agreed to include:

The use of reserve powers by governors-general is rare. In fact, they have only been used a handful of times. An example is in 1909 when Governor-General William Humble Ward refused to agree to an election after the government lost the support of the majority of the House of Representatives. Instead, he commissioned Alfred Deakin as Prime Minister and asked him to form a coalition government (the Fusion Government).

diagram to help explain In what instance in the past has the Governor-General used his powers?