Règle correspondante
Practice Relating to Rule 7. The Principle of Distinction between Civilian Objects and Military Objectives
Section B. Attacks against military objectives
Indonesia’s Military Manual (1982) provides: “The targets of every military operation should be distinguished at all times. The attack should only be directed to military objects.” 
Indonesia, The Basics of International Humanitarian Law, Legal Division of the Indonesian Armed Forces, 1982, § 91.