官方的说法是
Generally, the requirements for Australian citizenship include living in Australia for a specified period of time and being of good character and have passed a citizenship test if aged between 18 and 60 (unless otherwise exempt). A person is usually eligible for Australian citizenship if they have resided lawfully in Australia for four (4) years immediately before applying, including:
• at least 12 months as a permanent resident
• no absences from Australia of more than 12 months
• no absences from Australia of more than 90 calendar days during the 12 months before applying.