Соответствующая норма
Sierra Leone
Practice Relating to Rule 1. The Principle of Distinction between Civilians and Combatants
Section C. Attacks against civilians
Sierra Leone’s Instructor Manual (2007) provides: “[A]ll combat activity must be justified on military grounds, attacks which are not justified or militarily necessary are prohibited. Attacking civilians … is prohibited because no military advantage is gained by doing so.” 
Sierra Leone, The Law of Armed Conflict. Instructor Manual for the Republic of Sierra Leone Armed Forces (RSLAF), Armed Forces Education Centre, September 2007, pp. 20–21.
The manual further states that those “who may not be attacked during armed conflict” include “civilians and civilian population (unless they are fighting)”. 
Sierra Leone, The Law of Armed Conflict. Instructor Manual for the Republic of Sierra Leone Armed Forces (RSLAF), Armed Forces Education Centre, September 2007, p. 29; see also p. 34.
Sierra Leone’s Geneva Conventions Act (2012) states:
2. Grave breaches of the [1949 Geneva] Conventions and the [1977] First [Additional] Protocol.
(1) A person of whatever nationality commits an offence if that person, whether within or outside Sierra Leone[,] commits, aids, abets or procures any other person to commit a grave breach specified in –
(e) … paragraph … 3 … of Article 85 of the First Protocol [on, inter alia, the grave breach of making the civilian population or individual civilians the object of attack]. 
Sierra Leone, Geneva Conventions Act, 2012, Section 2(1)(e).