Related Rule
Peru
Practice Relating to Rule 107. Spies
Peru’s IHL Manual (2004) states that, in the context of air warfare:
An individual found on board a belligerent or neutral aircraft can be considered a spy only when, during a flight acting clandestinely or on false pretences, he obtains or endeavours to obtain information within the belligerent jurisdiction or in the zone of operations of a belligerent, with the intention of communicating it to the hostile party. 
Peru, Manual de Derecho Internacional Humanitario para las Fuerzas Armadas, Resolución Ministerial Nº 1394-2004-DE/CCFFAA/CDIH-FFAA, Lima, 1 December 2004, § 173.a.
Peru’s IHL and Human Rights Manual (2010) states:
An individual found on board a belligerent or neutral aircraft can be considered a spy only when, during a flight acting clandestinely or on false pretences, he obtains or endeavours to obtain information within the belligerent jurisdiction or in the zone of operations of a belligerent, with the intention of communicating it to the hostile party. 
Peru, Manual de Derecho Internacional Humanitario y Derechos Humanos para las Fuerzas Armadas, Resolución Ministerial No. 049-2010/DE/VPD, Lima, 21 May 2010, § 164(a), p. 344.