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Peru
Practice Relating to Rule 65. Perfidy
Section A. General
Peru’s IHL Manual (2004) states that “a distinction must be made between ruses of war (permitted) and perfidy (prohibited)”. 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, § 27.e.(1).
The manual further states: “Perfidy is a hostile act carried out under the cover of legal protection.” 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, § 27.e.(9).
The manual defines the term “perfidy” as: “Acts inviting the confidence of an adversary to lead it to believe that it is entitled to, or is obliged to accord, protection under the rules of international law applicable in armed conflict, with intent to betray that confidence.” 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, § 135.c.
The manual defines the term “treachery” as: “The term used in the law of armed conflict to forbid killing or wounding individuals belonging to the hostile nation or army by betraying the confidence of an adversary.” 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, § 135.c.
In the context of air warfare, the manual states:
Perfidy is always illegal.
Perfidy is prohibited without any kind of qualification identifying it with any particular type of warfare. In other words, it is prohibited to engage in hostile acts, regardless of the military advantage they may secure, that are designed to betray the enemy’s good will. 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, Annex 9, Glossary of Terms.
Peru’s IHL and Human Rights Manual (2010) states that “a distinction must be made between ruses of war (permitted) and perfidy (prohibited).” 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 28(e)(1), p. 238.
The manual further states: “Perfidy is a hostile act carried out under the cover of legal protection.” 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 28(e)(2), p. 239.
In its Glossary of Terms, the manual defines “perfidy” as: “Acts inviting the confidence of an adversary to lead it to believe that it is entitled to, or is obliged to accord, protection under the rules of international law.” 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, p. 411; see also § 126(c), p. 319.
In its Glossary of Terms, the manual defines “treachery” as: “The term used in the law of armed conflict to forbid killing or wounding individuals belonging to the hostile nation or army by betraying the confidence of an adversary.” 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, p. 416.
In the context of air warfare, the manual states:
Perfidy is always illegal.
Perfidy is prohibited without any kind of qualification identifying it with any particular type of warfare. In other words, it is prohibited to engage in hostile acts, regardless of the military advantage they may secure, that are designed to betray the enemy’s good will. 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 156(b), p. 339.
At the CDDH, Peru deplored the elimination of numerous articles and paragraphs in the final version of the 1977 Additional Protocol II, especially the one relating to the prohibition of perfidy. 
Peru, Statement at the CDDH, Official Records, Vol. VII, CDDH/SR.56, 8 June 1977, p. 226, § 161.