Related Rule
Sierra Leone
Practice Relating to Rule 3. Definition of Combatants
Sierra Leone’s Instructor Manual (2007) states:
A combatant is a member of the armed forces, except religious and medical personnel, or a member of any organised fighting force … In most cases they are distinguished by their uniform or a fixed recognized distinctive sign, or at least by carrying their weapons openly. 
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. 24.
[emphasis in original]