Related Rule
Greece
Practice Relating to Rule 16. Target Verification
The Hellenic Navy’s International Law Manual (1995) provides: “In the course of planning and developing of military operations, all available data and evidence should be taken into account to ensure that selected targets are clearly of a military character.” 
Greece, International Law Manual, Hellenic Navy General Staff, Directorate A2, Division IV, 1995, Chapter 7, Part I, § 2(a).