Соответствующая норма
Solomon Islands
Practice Relating to Rule 74. Chemical Weapons
In its written statement submitted to the ICJ in the Nuclear Weapons case in 1995, Solomon Islands stated: “International law prohibits the use of weapons which: – are chemical.” 
Solomon Islands, Written statement submitted to the ICJ, Nuclear Weapons case, 19 June 1995, p. 62, § 3.77.