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ARTICLE-52: Coercion of a State by the threat or use of force     [go to this ARTICLE]
... A treaty is void if its conclusion has been procured by the threat or use of force in violation of the principles of international law embodied in the Charter of the United Nations. ...


ARTICLE-53: Treaties conflicting with a peremptory norm of general international law (jus cogens)     [go to this ARTICLE]
... A treaty is void if, at the time of its conclusion, it conflicts with a peremptory norm of general international law. For the purposes of the present Convention, a peremptory norm of general international law is a norm accepted and recognized by the international community of States as a whole as a norm from which no derogation is permitted and which can be modified only by a subsequent norm of general international law having the same character. ...


ARTICLE-64: Emergence of a new peremptory norm of general international law (jus cogens)     [go to this ARTICLE]
... If a new peremptory norm of general international law emerges, any existing treaty which is in conflict with that norm becomes void and terminates. ...


ARTICLE-69: Consequences of the invalidity of a treaty     [go to this ARTICLE]
... 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. ...
... 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. ...


ARTICLE-71: Consequences of the invalidity of a treaty which conflict with a peremptory norm of general international law     [go to this ARTICLE]
... 1. In the case of a treaty which is void under article 53 the parties shall: ...
... 2. In the case of a treaty which becomes void and terminates under article 64, the termination of the treaty: ...