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Vienna Convention on the Law of Treaties
PART-II: CONCLUSION AND ENTRY INTO FORCE OF TREATIES
SECTION-1: CONCLUSION OF TREATIES
ARTICLE 18: Obligation not to defeat the object and purpose of a treaty prior to its entry into force
ARTICLE 18: Obligation not to defeat the object and purpose of a treaty prior to its entry into force
A State is obliged to refrain from acts which would defeat the object and purpose of a treaty when:
(a) it has signed the treaty or has exchanged instruments constituting the treaty subject to ratification, acceptance or approval, until it shall have made its intention clear not to become a party to the treaty; or
(b) it has expressed its consent to be bound by the treaty, pending the entry into force of the treaty and provided that such entry into force is not unduly delayed.