SOUTH AUSTRALIA'S LOCKDOWN RULES:
* South Australia to go into a six-day lockdown from midnight on Wednesday with wide-ranging restrictions.
* The "circuit-breaker" measure will be followed by another eight days of lesser restrictions.
* Schools, universities, pubs, restaurants, cafes, factories, shopping centres, takeaway food outlets and food courts will close.
* People will be required to stay home or only leave to get a COVID-19 test, seek other medical help, or to obtain groceries.
* All weddings, funerals and sport will be banned and aged care homes will go into lockdown.
* Masks to be used outside the home.
* Regional travel will be banned, with anyone currently on holiday having until midnight to determine where they will stay for the next six days.
* All elective surgery to cease.
* Supermarkets, petrol stations, medical centres, critical infrastructure, public transport, airport and freight services, banks, post offices and veterinary practices will stay open.
* Children of essential workers will be allowed to attend school or child care.