In Australia, laws and driving regulations differ from state to state. Some states require you to carry an International Licence with your current foreign licence. Other states request you carry your current foreign driver's licence together with a formal translation of your licence into English.
In most Australian states and territories (the exception is the Northern Territory), you are able to drive on a overseas licence as long as it is current. You can only drive vehicles which your overseas licence authorises you to drive and you must drive according to any conditions on your overseas licence.
Select the state or territory you will be driving in to find out what the laws are for driving with an overseas licence.