Соответствующая норма
Practice Relating to Rule 7. The Principle of Distinction between Civilian Objects and Military Objectives
Section D. Attacks against places of civilian concentration, including schools
In 1996, during a debate in the UN Security Council, Botswana commented on the numerous violations of the fundamental human rights of the Afghan civilian population documented by international human rights organizations, listing among such violations the bombing of residential areas. 
Botswana, Statement before the UN Security Council, UN Doc. S/PV.3648, 9 April 1996, p. 15.