Article 24 Ruses of war and the employment of methods necessary to obtain information about the enemy and the country, are considered allowable.
Article 25 The attack or bombardment of towns, villages, habitations or buildings which are not defended, is prohibited.
Article 26 The commander of an attacking force, before commencing a bombardment, except in the case of an assault, should do all he can to warn the authorities.
Article 27 In sieges and bombardments all necessary steps should be taken to spare as far as possible edifices devoted to religion, art, science, and charity, hospitals, and places where the sick and wounded are collected, provided they are not used at the same time for military purposes.
The besieged should indicate these buildings or places by some particular and visible signs, which should previously be notified to the assailants.