When you move house in Australia, you have to let (well in Victoria State) VicRoads know your new address within weeks, or face a fine.
However, I'm looking to either go travelling for a few months, or move to a new country. My Aus license will still be current, but with an out-of-date address, as I'm leaving my apartment, but won't have a new address to put on.
What are you meant to do when moving overseas, in terms of updating this address?