Соответствующая норма
Practice Relating to Rule 64. Conclusion of an Agreement to Suspend Combat with the Intention of Attacking by Surprise the Adversary Relying on It
Under Hungary’s Criminal Code (1978), as amended in 1998, “the person who infringes the conditions of armistice” is guilty, upon conviction, of a war crime. 
Hungary, Criminal Code, 1978, as amended in 1998, Section 162(1).