Article 23. In addition to the prohibitions provided by special conventions, it is especially forbidden:
(a) To employ poison or poisoned weapons.
(c) To kill or wound an enemy who, having laid down his arms, or having no longer means of defense, has surrendered at discretion.
(d) To declare that no quarter will be given.
(e) To employ arms, projectiles, or material calculated to cause unnecessary suffering.
(f) To make improper use of a flag of truce, of the national flag, or of the military insignia and uniform of the enemy, as well as the distinctive badges of the Geneva Convention.
(g) To destroy or seize the enemy's property, unless such destruction or seizure be imperatively demanded by the necessities of war.
(h) A belligerent is likewise forbidden to compel the nationals of the hostile party to take part in the operations of war directed against their own country, even if they were in the belligerent's service before the commencement of the war.
Article 25. The attack or bombardment, by whatever means, of towns, villages, dwellings, or buildings which are undefended is prohibited.
Article 27. In sieges and bombardments all necessary steps must be taken to spare, as far as possible, buildings dedicated to religion, art, science, or charitable purposes, historic monuments, hospitals and places where the sick and wounded are collected, provided they are not being used at the time for military purposes.