South Australia will not rush to reopen its borders with Victoria but officials are "far more confident" of dropping all COVID-19 restrictions in time for Christmas, Premier Steven Marshall says.
SA on Tuesday outlined a plan to scrap the state's hard border closure in about two weeks.
The hard border will be replaced with a requirement for visitors from Victoria to quarantine in a private residence for two weeks.
Moving further will depend on what happens with infection numbers in Victoria as the state starts to emerge from its lockdown.
SA health officials are particularly keen to see a further two weeks of no community transmission, similar to a requirement placed on NSW.
"We've said that we don't want to keep the border (closure) in place one day longer than we need to," Mr Marshall said on Wednesday.
"But the health advice at the moment is that we still need to be very cautious about Victoria.
"They're just starting to ease their restriction and we need to see the effect of that."
The premier said if SA moved too early the health consequence and the impacts on the state's economy could be catastrophic.
"It's really important we have a methodology that reflects the best science that we know about this disease," he said.
"So we won't be rushing it, but I've got to say we are all feeling far more confident about Victoria and opening up to them by Christmas."
South Australia reported one new coronavirus case on Wednesday, with a man in his 60s who recently returned from overseas testing positive while in hotel quarantine.
His case takes the total in SA since the start of the pandemic to 504.
There are still 12 active infections, all people in hotel quarantine.