Related Rule
Sierra Leone
Practice Relating to Rule 7. The Principle of Distinction between Civilian Objects and Military Objectives
Section C. Attacks against civilian objects in general
Sierra Leone’s Instructor Manual (2007) states: “Civilian objects are those objects that are not military objectives and therefore should 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, p. 26; see also p. 29.
(emphasis in original)
The manual further states: “Attack only military objectives. Civilian objects are to be spared, unless they are used for military purposes by the enemy.” 
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. 34.