相关规则
Switzerland
Practice Relating to Rule 106. Conditions for Prisoner-of-War Status
Section B. Levée en masse
Switzerland’s Basic Military Manual (1987) states: “The civilian population does not have the right to take up arms except in the case of a levée en masse to resist an invader.” 
Switzerland, Lois et coutumes de la guerre (Extrait et commentaire), Règlement 51.7/II f, Armée Suisse, 1987, Article 26(3).
The manual further states:
The civilian population of a non-occupied territory which, en masse, takes up arms spontaneously at the approach of the enemy is entitled to commit acts of war, even if this population did not have time to organize itself, provided arms are carried openly and the laws and customs of war are respected. 
Switzerland, Lois et coutumes de la guerre (Extrait et commentaire), Règlement 51.7/II f, Armée Suisse, 1987, Article 65.