Related Rule
Sierra Leone
Practice Relating to Rule 54. Attacks against Objects Indispensable to the Survival of the Civilian Population
Section A. Attacks against objects
Sierra Leone’s Instructor Manual (2007) provides: “Don’t attack or destroy items which [civilians] depend upon for survival (foodstuffs, drinking water, agricultural areas, crops and livestock, irrigation systems).” 
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. 36; see also p. 19.