Соответствующая норма
Practice Relating to Rule 15. The Principle of Precautions in Attack
Section B. Avoidance or minimization of incidental damage
The Report on the Practice of Jordan considers that “it is normal that the military command[er] in charge should take in an attack all feasible precautions to avoid causing injury, loss or damage to the civilian population”. 
Report on the Practice of Jordan, 1997, Chapter 1.6.