Related Rule
South Africa
Practice Relating to Rule 54. Attacks against Objects Indispensable to the Survival of the Civilian Population
South Africa’s LOAC Manual (1996) provides: “Objects which are essential to the survival of the civilian population (such as livestock, irrigation works and water supply) must not be attacked.” 
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, § 28(c).
South Africa’s Revised Civic Education Manual (2004) states: “Objects which are essential to the survival of the civilian population (such as livestock, irrigation works and water supply) must not be attacked.” 
South Africa, Revised Civic Education Manual, South African National Defence Force, 2004, Chapter 4, § 50(c).
South Africa’s ICC Act (2002) reproduces the war crimes listed in the 1998 ICC Statute, including in international armed conflicts: “intentionally using starvation of civilians as a method of warfare by depriving them of objects indispensable to their survival”. 
South Africa, ICC Act, 2002, Schedule 1, Part 3, § (b)(xxv).