Соответствующая норма
Practice Relating to Rule 51. Public and Private Property in Occupied Territory
Section A. Movable public property in occupied territory
Switzerland’s Basic Military Manual (1987) provides that, in occupied territory, “property belonging to the State or public authorities, to social or cooperative organizations, shall not be destroyed, except where such destruction is rendered absolutely necessary by military operations”. 
Switzerland, Lois et coutumes de la guerre (Extrait et commentaire), Règlement 51.7/II f, Armée Suisse, 1987, Article 169.