Related Rule
Australia
Practice Relating to Rule 65. Perfidy
Section A. General
Australia’s Commanders’ Guide (1994) provides:
Acts which constitute perfidy are those inviting the confidence of an adversary, leading him to believe that he is entitled or obliged to accord protection under the rules of international law, with an intent to betray that confidence. Perfidious conduct is outlawed by LOAC and therefore, either a person who engages or a commander who orders or acquiesces in perfidious conduct may be prosecuted. 
Australia, Law of Armed Conflict, Commanders’ Guide, Australian Defence Force Publication, Operations Series, ADFP 37 Supplement 1 – Interim Edition, 7 March 1994, § 502; see also § 826 (naval warfare) and § 902 (land warfare).
Australia’s Defence Force Manual (1994) states:
Perfidy is forbidden. Acts which constitute perfidy are those inviting the confidence of an adversary, thus leading that adversary to believe that there is an entitlement, or an obligation, to accord protection provided under LOAC, with an intent to betray that confidence. 
Australia, Manual on Law of Armed Conflict, Australian Defence Force Publication, Operations Series, ADFP 37 – Interim Edition, 1994, § 703.
Australia’s LOAC Manual (2006) states:
Perfidy is forbidden. Acts which constitute perfidy are those inviting the confidence of an adversary, thus leading that adversary to believe that there is an entitlement, or an obligation, to accord protection provided under the LOAC, with an intent to betray that confidence. 
Australia, The Manual of the Law of Armed Conflict, Australian Defence Doctrine Publication 06.4, Australian Defence Headquarters, 11 May 2006, § 7.3.
The LOAC Manual (2006) replaces both the Defence Force Manual (1994) and the Commanders’ Guide (1994).