79 
Organisation shall notify all Contracting Parties of the receipt of 
such instruments. = Petree ee gy as 
_4. Prior to the designation of the Organisation, the Secretarial func- 
tions herein attributed to it, shall be performed temporarily by the 
Government of the United Kingdom of Great Britain and Northern 
Ireland, as one of the depositaries of this Convention. 
ARTICLE XVI 
This Convention shall be open for signature by any State at London, 
Mexico City, Moscow and Washington from 29 December 1972 until 
31 December 1973. 
This Convention shall be subject to ratification. The instruments of 
ratification shall be ne with the Governments of Mexico, the 
Union of Soviet Socialist Republics, the United Kingdom of Great 
Britain and Northern Ireland, and the United States of America. 
ARTICLE XVUI 
Aiter 31 December 1973, this Convention shall be open for accession 
by any State. The instruments of accession shall be deposited with the 
Governments of Mexico, the Union of Soviet Socialist Republics, the 
‘United Kingdom of Great Britain and Northern Ireland, and the 
United States of America. 
ARTICLE XIX 
1. This Convention shall enter into force on the thirtieth day fol- 
lowing the date of deposit of the fifteenth instrument of ratification or 
accession. Pree 
2. For each Contracting Party ratifying or acceding to the Con- 
vention after ths deposit of the fifteenth instrument of ratification or 
accession, the Convention shall enter into force on the thirtieth day 
after deposit by such Party of its instrument of ratification or 
accession. 
ARTICLE XX 
The depositaries shall inform Contracting Parties: 
(as of signatures to this Convention and of the deposit of in- 
struments of ratification, accession or withdrawal, in accordance 
with Articles XVI, XVII, XVIII and XXI, and 
(6) of the date on which this Convention will enter into force, 
~ in accordance with Article XIX. 
ARTICLE XXI 
Any Contracting Party may withdraw from this Convention b 
giving six months’ notice in writing to a depositary, which shall 
promptly inform all Parties of such notice. 
| ARTICLE) XX1 
Liable | 
The original of this Convention of which the English, French, Rus- 
sian and Spanish texts are equally authentic, shall be deposited with 
