Соответствующая норма
Costa Rica
Practice Relating to Rule 64. Conclusion of an Agreement to Suspend Combat with the Intention of Attacking by Surprise the Adversary Relying on It
Costa Rica’s Penal Code (1970), as amended in 2002, punishes any person “who violates the truce or armistice agreed with between the nation and an enemy country or belligerent forces”. 
Costa Rica, Penal Code, 1970, as amended in 2002, Article 283.