Australian Citizenship Act 2007 Residence Requirements
To satisfy the residence requirements you must have:
4 years lawful residence in Australia.
This period must include 12 months as a permanent resident immediately before making an application for Australian citizenship
and absences from Australia of no more than 12 months in total in the 4 years prior to application,
including not more than 90 days in the 12 months immediately prior to application.
Lawful residence means residence in Australia on a temporary or permanent visa.