Règle correspondante
Switzerland
Practice Relating to Rule 65. Perfidy
Section D. Simulation of surrender
Switzerland’s Basic Military Manual (1987) prohibits perfidy. Thus, it states: “It is notably forbidden … to feign surrender.” 
Switzerland, Lois et coutumes de la guerre (Extrait et commentaire), Règlement 51.7/II f, Armée Suisse, 1987, Article 39.
The manual considers the “perfidious use of … distinctive signs recognized by the [1949 Geneva] Conventions or [the 1977 Additional Protocol I], in violation of Article 37 [of the 1977 Additional Protocol I],” as a grave breach of the 1977 Additional Protocol I. 
Switzerland, Lois et coutumes de la guerre (Extrait et commentaire), Règlement 51.7/II f, Armée Suisse, 1987, Article 193(1)(f).
Switzerland’s Regulation on Legal Bases for Conduct during an Engagement (2005) states:
15.2 Prohibited methods of warfare
223 Misuse of a distinctive sign and the feigning of protected status are prohibited in any place and at any time. Examples: … using the white flag to feign surrender and then opening fire on the approaching enemy … . 
Switzerland, Bases légales du comportement à l’engagement (BCE), Règlement 51.007/IVf, Swiss Army, issued based on Article 10 of the Ordinance on the Organization of the Federal Department for Defence, Civil Protection and Sports of 7 March 2003, entry into force on 1 July 2005, § 223.
Switzerland’s ABC of International Humanitarian Law (2009) states:
Perfidy
International humanitarian law prohibits killing, injuring or capturing an adversary by resorting to perfidy. Acts of perfidy include any form of deception designed to win the confidence of an adversary and lead him to believe that he is entitled or obliged to accord protection under the rules of international humanitarian law, with the intention of betraying that confidence. An example of perfidy is to falsely lay claim to protected status through the misuse of signs or emblems[.] 
Switzerland, Federal Department of Foreign Affairs, ABC of International Humanitarian Law, 2009, p. 34.