Related Rule
Liberia
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 1971, during a debate in the Third Committee of the UN General Assembly concerning respect for human rights in armed conflicts, Liberia stated that it “agreed wholeheartedly with the principle that … dwellings … should not be the object of military operations as affirmed in [principle 5] of General Assembly resolution 2675 (XXV)”. 
Liberia, Statement before the Third Committee of the UN General Assembly, UN Doc. A/C.3/SR.1890, 1 December 1971, § 8.