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El Salvador
Practice Relating to Rule 138. The Elderly, Disabled and Infirm
Section A. The elderly
El Salvador’s Soldiers’ Manual provides that it is prohibited to “attack and maltreat … the elderly”. It further states: “Every act of violence against … the elderly … is a criminal, cowardly and dishonourable act, punishable by serious disciplinary sanctions.” 
El Salvador, Manual del Combatiente, undated, pp. 3 and 4.
El Salvador’s Human Rights Charter of the Armed Forces provides: “The elderly must be protected.” 
El Salvador, Derechos Humanos. Decálogo de la Fuerza Armada de El Salvador, Ministerio de la Defensa Nacional, Departamento de Derecho Humanitario, undated, p. 7.