14 



vided for under Article IX so requests by a communication addressed 

 to the depositary Government, a Conference of all the Contracting 

 Parties shall be held as soon as practicable to review the operation 

 of the Treaty. 



(b) Any modification or amendment to the present Treaty which 

 is approved at such a Conference by a majority of the Contracting 

 Parties there represented, including a majority of those whose rep- 

 resentatives are entitled to participate in the meetings provided for 

 under Article IX, shall be communicated by the depositary Govern- 

 ment to all the Contracting Parties immediately after the termination 

 of the Conference and shall enter into force in accordance with the 

 provisions of paragraph 1 of the present Article. 



(c) If any such modification or amendment has not entered into 

 force in accordance with the provisions of subparagraph 1(a) of 

 this Article within a period of two years after the date of its com- 

 munication to all the Contracting Parties, any Contracting Party 

 may at any time after the expiration of that period give notice to the 

 depositary Government of its withdrawal from the present Treaty; 

 and such withdrawal shall take efi'ect two years after the receipt of 

 the notice by the depositary Government. 



Article XIII 



1. The present Treaty shall be subject to ratification by the signa- 

 tory States. It shall be open for accession by any State which is a 

 Member of the United Nations, or by any other State which may be 

 invited to accede to the Treaty with' the consent of all the Contracting 

 Parties whose representatives are entitled to participate in the meet- 

 ings provided for under Article IX of the Treaty. 



2. Eatification of or accession to the present Treaty shall be effected 

 by each State in accordance with its constitutional processes. 



3. Instruments of ratification and instruments of accession shall 

 be deposited with the Government of the United States of America, 

 hereby designated as the depositary Government. 



4. The depositary Government shall inform all signatory and 

 acceding States of the date of each deposit of an instrument of ratifi- 

 cation or accession, and the date of entry into force of the Treaty 

 and of any modification or amendment thereto. 



5. Upon the deposit of instruments of ratification by all the signa- 

 tory States, the present Treaty shall enter into force for those States 

 and for States which have deposited instruments of accession. There- 

 after the Treaty shall enter into force for any acceding State upon 

 the deposit of its instrument of accession. 



6. The present Treaty shall be registered by the depositary Gov- 

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



Article XIV 



The present Treaty, done in the English, French, Kussian, and 

 Spanish languages, each version being equally authentic, shall be de- 

 posited in the archives of the Government of the United States of 



