Règle correspondante
Practice Relating to Rule 12. Definition of Indiscriminate Attacks
Section C. Attacks whose effects cannot be limited as required by international humanitarian law
Ukraine’s IHL Manual (2004) states: “Indiscriminate attacks are … attacks that fail to conform to principles of international humanitarian law”. 
Ukraine, Manual on the Application of IHL Rules, Ministry of Defence, 11 September 2004, § 2.4.3.