1. After the expiry of two years from the date of the coming into force of this Convention (article 41, paragraph 1) any Party may, on its own behalf or on behalf of a territory for which it has international responsibility, and which has withdrawn its consent given in accordance with article 42, denounce this Convention by an instrument in writing deposited with the Secretary-General.
2. The denunciation, if received by the Secretary-General on or before the first day of July in any year, shall take effect on the first day of January in the succeeding year, and, if received after the first day of July, shall take effect as if it had been received on or before the first day of July in the succeeding year.
Any drug reform laws inconsistent with the Single Convention on Narcotic Drugs really needs to go through the treaty withdrawal process. Uruguay's method of drug reform is going to land it in unnecessary trouble.
3. This Convention shall be terminated if, as a result of denunciations made in accordance with paragraph 1, the conditions for its coming into force as laid down in article 41, paragraph 1, cease to exist.