I want to know the answer to the following question:
Which article of the Vienna Convention on the Law of Treaties provides that there is a presumption that treaties cannot be unilaterally denounced?
All the background I'm provided with is that "Article 56 of the Vienna Convention on the Law of Treaties provides that where a treaty is silent over whether or not it can be denounced there is a rebuttable presumption that it cannot be unilaterally denounced unless:". Is that enough to answer the question?