South Australia has removed hard border restrictions for travellers from Greater Perth, but will keep a testing regime in place.
Premier Steven Marshall says people from the previously designated hotspots in Western Australia - Perth, the Peel region, and the South West - will still be required to have COVID-19 tests on days, one, five and 12.
They must isolate until they receive a negative result from the first test.
Anyone from Western Australia currently in quarantine in South Australia will be allowed to leave provided they have not visited the Four Points Hotel in Perth.
South Australia will not change its current border arrangements with Victoria, with people from Greater Melbourne required to have the three virus tests.
Mr Marshall has also revealed about 60,000 South Australians will be included in the first wave to receive COVID-19 vaccines.
He said those people will be proactively contacted by SA Health with nine hospitals in Adelaide and regional centres to act as virus distribution hubs.
South Australia reported one new virus case on Friday in a woman in her 30s who recently returned to Australia from overseas and is in hotel quarantine.
SA Health said genomic testing on an earlier case has also confirmed that a man in his 40s had the South African variant of the virus, the first such case detected in South Australia.
People in Australia must stay at least 1.5 metres away from others. Check your jurisdiction's restrictions on gathering limits. If you are experiencing cold or flu symptoms, stay home and arrange a test by calling your doctor or contact the Coronavirus Health Information Hotline on 1800 020 080.
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