Denunciation refers to the announcement of a treaty's termination. Some treaties contain a termination clause that specifies that the treaty will terminate if a certain number of nations denounce the treaty. For instance, the Single Convention on Narcotic Drugs' Article 41 specifies that the treaty will terminate if, as a result of denunciations, the number of Parties falls below 40http://www.incb.org/e/conv/1961/articles_II.htm#41.