Yes and No for returning citizens depending on which state that you are returning to. Today I received an email from the Premier’s office in SA stating that for international arrivals, they must be fully vaccinated and must do 7 days quarantine. This can be done at a suitable premises if no other people are there; ie; your own home. The government will decide if your nominated place is suitable or not and if not you will have to pay for 7 day quarantine at a nominated facility. Additionally, the writer said to check the website.