Соответствующая норма
Sierra Leone
Practice Relating to Rule 1. The Principle of Distinction between Civilians and Combatants
Section A. The principle of distinction
Sierra Leone’s Instructor Manual (2007) states:
The aim of the instruction of law of war within the armed forces is to ensure that, in fulfilling their mission, each and every member of them respects the fundamental rules of the law, which is based on the distinction that must be made at all times between military objectives and civilian persons and objects, and protects all civilians and persons not or no longer involved in combat actions, irrespective of the situation, place, time or any other circumstances. 
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. 10.
The manual further states:
In every military operation a distinction must be made between combatants and non-combatants For example those taking direct part in hostilities may be attacked and those not or no longer taking part in hostilities may not be attacked. 
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. 18–19; see also p. 35.
[emphasis in original]