Related Rule
Sierra Leone
Practice Relating to Rule 89. Violence to Life
Sierra Leone’s Instructor Manual (2007) states:
[T]here are certain human rights that can never be suspended no matter the situation. These are referred to as hard-core rights and they include … the right to life … Hard core rights are protected under the LoAC as well. 
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. 18.
[emphasis in original]
Sierra Leone’s Constitution (1991) states:
16. Protection of right to life.
(1) No person shall be deprived of his life intentionally except in execution of the sentence of a court in respect of a criminal offence under the laws of Sierra Leone, of which he has been convicted.
(2) Without prejudice to any liability for a contravention of any other law with respect to the use of force in such cases as are hereinafter mentioned, a person shall not be regarded as having been deprived of his life in contravention of this section if he dies as a result of the use of force to such extent as is reasonably justifiable in the circumstances of the case, that is to say –
a. for the defence of any person from unlawful violence or for the defence of property; or
b. in order to effect a lawful arrest or to prevent the escape of a person lawfully detained; or
c. for the purpose of suppressing a riot, insurrection or mutiny; or
d. in order to prevent the commission by that person of a criminal offence; or
e. if he dies as a result of a lawful act of war. 
Sierra Leone, Constitution, 1991, Section 16.
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 –
(a) article 50 of the First Geneva Convention [on, inter alia, the grave breach of wilful killing];
(b) article 51 of the Second Geneva Convention [on, inter alia, the grave breach of wilful killing];
(c) article 130 of the Third Geneva Convention [on, inter alia, the grave breach of wilful killing];
(d) article 147 of the Fourth Geneva Convention [on, inter alia, the grave breach of wilful killing]. 
Sierra Leone, Geneva Conventions Act, 2012, Section 2(1)(a)–(d).