Related Rule
Ukraine
Practice Relating to Rule 19. Control during the Execution of Attacks
Ukraine’s IHL Manual (2004) states:
Commander (commanding officer) and staff shall constantly specify the character (status) of objects (objectives) planned for fire damage and the location of objects (areas) protected by international humanitarian law. If it becomes obvious that the targeted object is not a military objective, its targeting is cancelled and the mission of the subordinates is adjusted accordingly. 
Ukraine, Manual on the Application of IHL Rules, Ministry of Defence, 11 September 2004, § 2.3.3.3.