The South African High Commission in Australia is unable to tell me the period required, after completing a 90-day visa in South Africa, before being able to re-enter South Africa on another 90-day visa on an Australian passport. I plan to go to the UK in-between the two visas but need to know the necessary period in-between. I'd appreciate advice if anyone has had experience of this?
I could not find an official South African Immigration source. However, Handyvisas.com states:
all citizens of countries who do not need a visa for South Africa are only able to spend a maximum of 90 days in the country within every year.
You could try contacting South African Immigration Services for clarification.