Соответствующая норма
Sri Lanka
Practice Relating to Rule 71. Weapons That Are by Nature Indiscriminate
In its written statement submitted to the ICJ in the Nuclear Weapons (WHO) case, Sri Lanka stated:
The unacceptability of the use of weapons that fail to discriminate between military and civilian personnel is firmly established as a fundamental principle of international humanitarian law. These principles which prohibit indiscriminate killing and make the fundamental distinction between combatants and non-combatants have also found expression in the body of treaty law which have been incorporated in a series of international conventions, from about the time of the 1899 Hague Peace Conference and culminating with the Geneva Conventions of 1949 and [their] Additional Protocols of 1977. 
Sri Lanka, Written statement submitted to the ICJ, Nuclear Weapons (WHO) case, undated, p. 2.