In the Regulations made in terms of Section 27(2) of the Disaster Management Act published on 25 March 2020, it states that every gathering is prohibited, except for a funeral. In the case of a lockdown attendance at a funeral is limited to 50 people, provided that no night vigil is held and that all safety measures are strictly adhered to.
The Lockdown Regulations can be found here (25 March), here (26 March) and here (2 April).
Please visit www.gov.za/coronavirus for regular updates to the Regulations.