Practice Relating to the Use of Prohibited Weapons
Bulgaria’s Penal Code (1968), as amended in 1999, provides that “a person who, in violation of the rules of international law for waging war, uses or orders the use of … impermissible means or methods for waging war” commits a war crime. 
Bulgaria, Penal Code, 1968, as amended in 1999, Article 415(1).