Original sentence: The Australian Parliament in 1973 gave the Queen the title Queen of Australia, thus confirming her status as Australia's monarch
Edited sentence: In effect, under the Statute of Westminster the Empire went from being one unified unit with one head of state, to a collection of independent states, the British Commonwealth, each with its own head of state, who was the King or Queen of the United Kingdom.Recognising this, the Australian Parliament in 1973 gave the Queen the title Queen of Australia, thus confirming her status as Australia's head of state