Соответствующая норма
Practice Relating to Rule 69. Loss of Inviolability of Parlementaires
Switzerland’s Basic Military Manual (1987) states: “The parlementaire loses his right to inviolability if it is proven in a positive and incontestable manner that he has taken advantage of his privileged position to provoke or commit an act of treason.” 
Switzerland, Lois et coutumes de la guerre (Extrait et commentaire), Règlement 51.7/II f, Armée Suisse, 1987, Article 15.
Switzerland’s Regulation on Legal Bases for Conduct during an Engagement (2005) states that, in application of the principle of distinction, a “parlementaire [who] approaches with a white flag” must not be shot at, explaining: “Protected person, until he has returned to his own troops, except if he commits a harmful act”. 
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, § 172.