623 



realized. Such review shall take into account any relevant techno"- 

 logical developments. The review conference shall determine, in ac- 

 cordance with the views of a majority of those Parties attending, 

 whether and when an additional review conference shall be convened. 



Article 8 



Each State Party to this Treaty shall in exercising its national sov- 

 ereignty have the right to withdraw from this Treaty if it decides that 

 extraordinary events related to the subject matter of this Treaty have 

 jeopardized the supreme interests of its country. It shall give notice of 

 such withdrawal to all other States Parties to the Treaty and to the 

 United Nations Security Council three months in advance. Such no- 

 tice shall include a statement of the extraordinary events it considers 

 to have jeopardized its supreme interests. 



Article 9 



The provisions of this Treaty shall in no way affect the obligations 

 assumed by States Parties to the Treaty under international instru- 

 ments establishing zones free from nuclear weapons. 



Article 10 



1. This Treaty shall be open for signature to all States. Any State 

 which does not sign the Treaty before its entry into force in accord- 

 ance with paragraph 3 of this article may accede to it at any time. 



2. This Treaty shall be subject to ratification by signatory States. 

 Instruments of ratification and of accession shall be deposited with 

 the Governments of the United States of America, the United King- 

 dom of Great Britain and Northern Ireland, and the Union of Soviet 

 Socialist Republics, which are hereby designated the Depositary 

 Governments. 



3. This Treaty shall enter into force after the deposit of instru- 

 ments of ratification by twenty-two Governments, including the Gov- 

 ernments designated as Depositary Governments of this Treaty. 



4. For States whose instruments of ratification or accession are de- 

 posited after the entry into force of this Treaty, it shall enter into 

 force on the date of the deposit of their instruments of ratification or 

 accession. 



5. The Depositary Governments shall promptly inform the Gov- 

 ernments of all signatory and acceding States of the date of each sig- 

 nature, of the date of deposit of each instrument of ratification or of 

 accession, of the date of the entry into force of this Treaty, and of 

 the receipt of other notices. 



6. This Treaty shall be registered by the Depositary Governments 

 pursuant to Article 102 of the Charter of the United Nations. 



Article 11 



This Treaty, the English, Russian, French, Spanish and Chinese 

 texts of which are equally authentic, shall be deposited in the archives 

 of the Depositary Governments. Duly certified copies of this Treaty 



