Related Rule
South Africa
Practice Relating to Rule 157. Jurisdiction over War Crimes
South Africa’s LOAC Manual (1996) states: “Signatory States [of the 1949 Geneva Conventions] are required to treat as criminals under domestic law anyone who commits or orders a grave breach [of the 1949 Geneva Conventions].” 
South Africa, Presentation on the South African Approach to International Humanitarian Law, Appendix A, Chapter 4: International Humanitarian Law (The Law of Armed Conflict), National Defence Force, 1996, § 35.