I’m not in a position to know whether they have or they haven’t.
They , together with NZ have shut their borders. We were questioned last week at Perth Airport about our citizenship.
Aussies aren’t allowed out and only Aussies are allowed in.
When they arrive back they have to go into hotels for 2 weeks.
The cost is paid by the government.
We walked back through a HR that resembled the Marie Celeste. There were a few immigration officers that checked the passports of those who couldn’t work the automatic reader. We noticed 2 posters, they were in English. No one even asked us if we were going to self isolate or indicated that we should. No leaflets in any language.
Although we had flown to WA from SA 5 days before they closed state borders when we got to Perth and checked into a hotel we had to stay in the room for 6 days.
They do seem to think that it is is good idea to keep any more infected people out.