Règle correspondante
Practice Relating to Rule 138. The Elderly, Disabled and Infirm
Section A. The elderly
Switzerland’s Basic Military Manual (1987) provides: “Belligerents shall conclude special agreements in order to evacuate the … elderly … from besieged areas.” It further provides: “Transports of civilian … aged persons … effected by vehicles and hospital trains, shall be respected in the same way as hospitals.” 
Switzerland, Lois et coutumes de la guerre (Extrait et commentaire), Règlement 51.7/II f, Armée Suisse, 1987, Articles 33 and 37.
Switzerland’s Regulation on Legal Bases for Conduct during an Engagement (2005) states: “Women and children as well as elderly and disabled persons must be specially protected.” 
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, § 199.
(emphasis in original)