相关规则
Sweden
Practice Relating to Rule 65. Perfidy
Sweden’s IHL Manual (1991) considers that the prohibition of perfidy as contained in Article 37 of the 1977 Additional Protocol I is part of customary international law. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 2.2.3, p. 18.
The manual states:
Sweden and several other countries wished the [prohibition of perfidy] to be inserted in Additional Protocol II as well, since perfidy is probably equally common in internal conflicts. The majority were against this, however, the main reason being that, in conflicts of this type, particular difficulties may arise in determining exactly what may be considered perfidy.
The concept of perfidy, or perfidious conduct which is a more adequate expression, is defined as acts inviting the confidence of an adversary giving the acting party a legally protected status. This protection is abused in order to kill, injure or capture the adversary’s soldiers. Perfidy thus means that one party deliberately and on false grounds invites the confidence of the other in order then to betray this confidence by acts of violence. It should be added that perfidy, as defined in Article 37 [of the 1977 Additional Protocol I], refers to acts against persons, but does not include sabotage or the destruction of property …
Only where protected status is employed for killing, injuring or capturing the adversary is the act considered as perfidy …
Accusations of perfidy are always judged to be extremely grave, since a crime against Article 37 [of the 1977 Additional Protocol I] shall according to the bases of Additional Protocol I be viewed as a grave breach of international humanitarian law. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 3.2.1.1.b, pp. 28–30.
Sweden’s IHL Manual (1991) affirms: “Under the provisions of the [1907 Hague Regulations] it is prohibited to kill or injure an enemy by resort to perfidy.” 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 3.2.1.1.b, pp. 28 and 29.
Under Sweden’s Penal Code (1962), as amended in 1998, “the killing or injuring of an opponent by means of some … form of treacherous behaviour” constitutes a crime against international law. 
Sweden, Penal Code, 1962, as amended in 1998, Chapter 22, § 6(2).
Under Sweden’s IHL Manual (1991), “the feigning of incapacitation by wounds or sickness” constitutes perfidious conduct. However, “if for example a soldier simulates injury or sickness only to avoid an adversary’s attack, this is not judged as perfidy”. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 3.2.1.1.b), p. 29.
Sweden’s IHL Manual (1991) notes that “the feigning of an intent to negotiate under a flag of truce” is defined as perfidious conduct by Article 37 of the 1977 Additional Protocol I. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 3.2.1.1.b, p. 29.
Under Sweden’s Penal Code (1962), as amended in 1998, misuse of flags of parlementaires or “the killing or injuring of an opponent by means of some other form of treacherous behaviour” constitutes a crime against international law. 
Sweden, Penal Code, 1962, as amended in 1998, Chapter 22, § 6(2).
Sweden’s IHL Manual (1991) provides: “Abuse of the distinctive emblem of the International Red Cross with perfidious intent is explicitly listed as perfidy and a gross infringement of international humanitarian law.” 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 3.2.1.1.b, p. 29.
Under Sweden’s Penal Code (1962), as amended in 1998, the misuse of emblems of medical aid (red cross) or “the killing or injuring of an opponent by means of some other form of treacherous behaviour” constitutes a crime against international law. 
Sweden, Penal Code, 1962, as amended in 1998, Chapter 22, § 6(2).
Sweden’s IHL Manual (1991) emphasizes that, pursuant to Article 37 of the 1977 Additional Protocol I, “the feigning of protected … status … of a member of the armed forces … of the United Nations” constitutes perfidious conduct. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 3.2.1.1.b, p. 29.
Under Sweden’s Penal Code (1962), as amended in 1998, the misuse of the insignia of the UN or “the killing or injuring of an opponent by means of some other form of treacherous behaviour” constitutes a crime against international law. 
Sweden, Penal Code, 1962, as amended in 1998, Chapter 22, § 6(2).
(emphasis added)
Under Sweden’s Penal Code (1962), as amended in 1998, the misuse of the sign for civil defence and other internationally recognized emblems or “the killing or injuring of an opponent by means of some other form of treacherous behaviour” constitutes a crime against international law. 
Sweden, Penal Code, 1962, as amended in 1998, Chapter 22, § 6(2).
(emphasis added)
Sweden’s IHL Manual (1991) states: “Abuse of international emergency signals with perfidious intent may also be viewed as an example of perfidy.” 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 3.2.1.1.b, p. 29.
Sweden’s IHL Manual (1991) mentions, as an example of perfidious conduct, “the feigning of protected civilian status”. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 3.2.1.1.b, p. 29.
Sweden’s IHL Manual (1991) considers as an example of perfidious conduct “the feigning of protected status … of a member of the armed forces of a neutral state”. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section 3.2.1.1.b, p. 29.