Chapter 2
Jurisdiction of South African Courts and Institution od Prosecutions in South African Courts in Respect of Crimes (ss 4-5)
4 Jurisdiction of South African courts in respect of crimes
(2) Despite any other law to the contrary, including customary and conventional international law, the fact that a person
(a) is or was a head of State or government, a member of a government or parliament, an elected representative or a government official; or
(b) being a member of a security service or armed force, was under a legal obligation to obey a manifestly unlawful order of a government or superior,
is neither-
(i) a defence to a crime; nor
(ii) a ground for any possible reduction of sentence once a person has been convicted of a crime.
Manifestly unlawful order
Customary international law
Immunity - national proceedings
Superior orders - national proceedings
EDIT.