Règle correspondante
Republic of Korea
Practice Relating to Rule 14. Proportionality in Attack
Section A. General
The Republic of Korea’s ICC Act (2007) provides for the punishment of anyone who commits the war crime of “[l]aunching an attack with the knowledge that such attack would cause death or injury to civilians or damage to civilian objects clearly excessive in relation to the concrete and direct overall military advantage anticipated” in both international and non-international armed conflicts. 
Republic of Korea, ICC Act, 2007, Article 13(1)(3).
According to the Report on the Practice of the Republic of Korea, it is the Republic of Korea’s opinio juris that the principle of proportionality in attack is a requirement of international law. 
Report on the Practice of the Republic of Korea, 1997, Chapter 1.5.