How long you can drive in Australia with overseas DL:
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Sydney (NSQ): 3 months
Melbourne (Victoria) : 6 months
Hobart (Tasmania) : 3 months
Brisbane (QLD) : 3 months
Northern Territory : 3 months
Canberra (ACT) : 3 months
Perth (WA) : Until overseas/international license is valid. Getting local DL does not require test
Adelaide (South Australia) : 3 months