2. The right of verification recognized by the States Parties in para- 

 graph 1 of this Article may be exercised by any State Party using its own 

 means or with the assistance of any other State Party. 



3. The States Parties to the Treaty undertake to consult and to coop- 

 erate with a view to removing doubts concerning the fulfillment of the 

 obligations assumed under this Treaty. 



Article IV 



Any State Party to the Treaty may propose amendments to this 

 Treaty. Amendments must be approved by a majority of the votes of all 

 the States Parties to the Treaty, including those of all the States Parties 

 to this Treaty possessing nuclear weapons, and shall enter into force for 

 each State Party to the Treaty accepting such amendments upon their 

 acceptance by a majority of the States Parties to the Treaty, including the 

 States which possess nuclear weapons and are Parties to this Treaty. There- 

 after, the amendments shall enter into force for any other Party to the 

 Treaty after it has accepted such amendments. 



Article V 



Each party to this Treaty shall in exercising its national sovereignty 

 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 Parties to the Treaty and to the United Nations Security Council 

 three months in advance. Such notice shall include a statement of the 

 extraordinary events it considers to have jeopardized its supreme interests. 



Article VI 



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 accordance 

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



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

 struments of ratification and of accession shall be deposited with the Govern- 

 ments of , which are hereby designated the Depositary 



Governments. 



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

 of ratification by twenty-two Governments, including the Governments 

 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 forthwide notify the Govern- 

 ments of all States signatory and acceding to this Treaty of the date of each 

 signature, of the date of deposit of each instrument of ratification or of ac- 

 cession, of the date of the entry into force of this Treaty, and of the receipt 

 of other notices. 



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