Соответствующая норма
Practice Relating to Rule 17. Choice of Means and Methods of Warfare
Sweden’s IHL Manual (1991) states that, after target verification, “the next step is for the attacker to select weapons and methods of attack such that unintentional civilian losses and damage to civilian property may be avoided as far as possible”. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section, p. 71.