Related Rule
Uruguay
Practice Relating to Rule 70. Weapons of a Nature to Cause Superfluous Injury or Unnecessary Suffering
Uruguay’s Law on Cooperation with the ICC (2006) states:
26.2. Persons and objects affected by the war crimes set out in the present provision are persons and objects which international law protects in international or internal armed conflict.
26.3. The following are war crimes:
28. Employing weapons, projectiles and material and methods of warfare which are of a nature to cause superfluous injury or unnecessary suffering … in violation of the international humanitarian law of armed conflict. 
Uruguay, Law on Cooperation with the ICC, 2006, Article 26.2 and 26.3.28.