Art. 101 CISG
(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.
Overview of case law on Art. 101 CISG: UNCITRAL Digest
The UNCITRAL Digest on the CISG can be used as a starting point to discover the relevant case law on this article.