Practice Relating to Rule 65. Perfidy
Mexico’s Army and Air Force Manual (2009) states:
The underlying idea of this body of law [i.e. IHL] is to humanize war. The three main principles established to this end are:
C. means of warfare involving perfidy, that is, those that are contrary to military honour, are prohibited.
The manual also states: “It is prohibited to: … kill or wound by means of treachery.”