Related Rule
Ecuador
Practice Relating to Rule 156. Definition of War Crimes
Ecuador’s Naval Manual (1989) provides:
War crimes are defined as those acts which violate the law of armed conflict, that is, the rules established by customary and conventional international law regulating the conduct of warfare, and which have been generally recognized as war crimes. Acts constituting war crimes may be committed by the armed forces of a belligerent or by individuals belonging to the civilian population. 
Ecuador, Aspectos Importantes del Derecho Internacional Marítimo que Deben Tener Presente los Comandantes de los Buques, Academia de Guerra Naval, 1989, § 6.2.5.