Article 69 Vienna Convention on the Law of Treaties
Consequences of the invalidity of a treaty
1. A treaty the invalidity of which is established under the present Convention is void. The provisions of a void treaty have no legal force.
2. If acts have nevertheless been performed in reliance on such a treaty:
(a) each party may require any other party to establish as far as possible in their mutual relations the position that would have existed if the acts had not been performed;
(b) acts performed in good faith before the invalidity was invoked are not rendered unlawful by reason only of the invalidity of the treaty.
3. In cases falling under article 49, 50, 51 or 52, paragraph 2 does not apply with respect to the party to which the fraud, the act of corruption or the coercion is imputable.
4. In the case of the invalidity of a particular State’s consent to be bound by a multilateral treaty, the foregoing rules apply in the relations between that State and the parties to the treaty.
See also: Article 68 Vienna Convention on the Law of Treaties
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