President Cyril Ramaphosa ordered a 21-day lockdown with severe restrictions on travel and movement – beginning midnight on Thursday – to combat the spread of the Covid-19 coronavirus in the country.
The document includes details on which businesses will close down over the period, and which services are considered essential. It also details the restriction of movement
For the period of lockdown: every person is confined to his or her place of residence, unless strictly for the purpose of performing an essential service, obtaining an essential good or service, collecting a social grant, or seeking emergency, life saving, or chronic medical attention.
Movement means entering or leaving a place of residence or, in the case of people nor ordinarily resident in the Republic, their place of temporary residence while in the Republic.
The full document is available here Final Regulations for Lockdown in South Africa