Соответствующая норма
Practice Relating to Rule 23. Location of Military Objectives outside Densely Populated Areas
Sweden’s IHL Manual (1991) refers to the obligation enshrined in Article 58(b) of the 1977 Additional Protocol I to “avoid locating military objectives within or near densely populated areas” and notes that “the expression ‘endeavour’ is not used in this case, which gives the rule greater force than that of Article 58(a)”. 
Sweden, International Humanitarian Law in Armed Conflict, with reference to the Swedish Total Defence System, Swedish Ministry of Defence, January 1991, Section, p. 74.