Practice Relating to Rule 12. Definition of Indiscriminate Attacks
Switzerland’s Regulation on Legal Bases for Conduct during an Engagement (2005) states: “
Indiscriminate attacks, i.e. attacks which cannot distinguish between protected persons/objects and military objectives, … are prohibited in any place and at any time.”

(emphasis in original)
Switzerland’s ABC of International Humanitarian Law (2009) states: “The principle of distinction imposes limits on means and methods of warfare: any
Weapon or strategy that cannot be directed exclusively at a specific military objective is prohibited.”