Norma relacionada
Republic of Korea
Practice Relating to Rule 7. The Principle of Distinction between Civilian Objects and Military Objectives
Section A. The principle of distinction
According to the Report on the Practice of the Republic of Korea, it is the Republic of Korea’s opinio juris that the distinction between civilian objects and military objectives is part of customary international law. 
Report on the Practice of the Republic of Korea, 1997, Chapter 1.3.