Italy
Practice Relating to the Use of Prohibited Weapons
Italy’s Wartime Military Penal Code (1941) punishes any “commander of a military force who, to harm the enemy, orders or authorizes the use of any of the methods or means of warfare that are prohibited by the law or by international conventions, or are in any way contrary to military honour”. It also punishes “anyone who, to harm the enemy, adopts means or uses methods that are prohibited by the law or by international conventions, or are in any way contrary to military honour”. 
Italy, Wartime Military Penal Code, 1941, Articles 174 and 175.