Anyone coming into Australia must first return a negative coronavirus test before departure, and masks will be mandatory on all flights going forward.
Prime Minister Scott Morrison announced these measures, along with the intent to reduce flight caps for international arrivals for the next month, today following National Cabinet.
The raft of new rules around travel are in direct response to the detection of the new highly-virulent UK strain of the virus in Australia.
Mr Morrison said from today passengers and crew must wear masks throughout any domestic flight and inside all Australian airports.
Children under 12 and those with specific medical conditions are exempt from this rule.
Australian passengers and crew must also be masked on any international flights or in overseas airports.
International air crews must undergo a COVID-19 test in Australia every seven days, and will have their own specialist quarantine location, and are not allowed to move around.
“These measures, over the course of the next week, and the compliance arrangements that sit around that, will be put in place by the Commonwealth and the state governments,” Mr Morrison said.
Alongside new rules for international travellers, Mr Morrison said there will be reduced caps on international travellers entering Australia.