question: Which article of the Vienna Convention on the Law of Treaties provides that there is a presumption that treaties can not be unilaterally denounced ?
answer: Article 56
turker_answer: Article 56 of the Vienna Convention on the Law of Treaties provides that there is a presumption that treaties can not be unilaterally denounced .
rule-based: Article 56 provides that there is a presumption that treaties can not be unilaterally denounced .