Соответствующая норма
Practice Relating to Rule 37. Open Towns and Non-Defended Localities
Hungary’s Military Manual (1992) qualifies “unlawful attacks on … undefended localities” as war crimes. 
Hungary, A Hadijog, Jegyzet a Katonai, Föiskolák Hallgatói Részére, Magyar Honvédség Szolnoki Repülötiszti Föiskola, 1992, p. 90.
Under Hungary’s Criminal Code (1978), as amended in 1998, “a military commander who, in violation of the rules of international law concerning warfare, … takes offensive against … a weapon-free zone” commits a war crime. 
Hungary, Criminal Code, 1978, as amended in 1998, Section 160(b).