Related Rule
South Africa
Practice Relating to Rule 129. The Act of Displacement
South Africa’s LOAC Manual (1996) provides that “unlawful deportation or transfer … of a protected person” is a grave breach. 
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, § 40.
South Africa’s ICC Act (2002) reproduces the crimes listed in the 1998 ICC Statute, including genocide by “forcibly transferring children of the group to another group”, and “deportation or forcible transfer of population” as a crime against humanity, as well as the war crimes of “unlawful deportation or transfer” of persons protected under the 1949 Geneva Conventions and “the deportation or transfer [by an occupying power] of all or parts of the population of the occupied territory within or outside this territory” in international armed conflicts and “ordering the displacement of the civilian population for reasons related to the conflict, unless the security of the civilians involved or imperative military reasons so demand” in non-international armed conflicts. 
South Africa, ICC Act, 2002, Schedule 1, Part 1, § (e), Part 2, § 1(d) and Part 3, §§ (a)(vii), (b)(viii) and (e)(viii).
South Africa’s ICC Act (2002) reproduces the war crimes listed in the 1998 ICC Statute, including in non-international armed conflicts: “ordering the displacement of the civilian population for reasons related to the conflict, unless the security of the civilians involved or imperative military reasons so demand”. 
South Africa, ICC Act, 2002, Schedule 1, Part 3, § (e)(viii).