A document has recently leaked on RSA social media, purportedly prepared by/for the government and proposing a possible future after this immediate lockdown - comment here, and the doc at the bottom of the page:
https://citizen.co.za/business/22733...-presentation/
There would be 5 stages of restrictions which could be cycled between at different times and in different areas (bit like load-shedding). Key for foreigners is that no hotels, bars or sit-in restaurants would be allowed to open
in any stage, and 'limited international travel' would only be allowed in stage 5, the loosest. There is no end date suggested for these restrictions.
It may or may not play out like this, of course.