Australia passport holders are visa exempt for up to unlimited stay provided the traveller:
hold a valid passport with a validity of at least 6 months with minimum 2 blank visa pages
have sufficient funds for the trip
have proof of onward/return flights
have all necessary documents for the purpose of entry
IMPORTANT NOTE: It is always recommended that traveller confirm with the airline that they can board without a visa. The final decision is subject to the Immigration Officer's discretion at point of entry.