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(1) A Contracting State may denounce this Convention, or Part II or Part III of the Convention, by a formal notification in writing addressed to the depositary.
(2) The denunciation takes effect on the first day of the month following the expiration of twelve months after the notification is received by the depositary. Where a longer period for the denunciation to take effect is specified in the notification, the denunciation takes effect upon the expiration of such longer period after the notification is received by the depositary.
Done at Vienna, this day of eleventh day of April, one thousand nine hundred and eighty, in a single original, of which the Arabic, Chinese, English, French, Russian and Spanish texts are equally authentic.
In witness whereof the undersigned plenipotentiaries, being duly authorized by their respective Governments, have signed this Convention.