526 



after deposit by such Party of its instrument of ratification or 

 accession. 



Article XX 



The depositaries shall inform Contracting Parties : 



{a) 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 



(h) 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 by 

 giving six months' notice in writing to a depositary, which shall 

 promptly inform all Parties of such notice. 



Article XXII 



The original of this Convention of which the English, French, Rus- 

 sian and Spanish texts are equally authentic, 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 who shall send certified copies thereof to all 

 States. 



IN WITNESS WHEREOF the undersigned Plenipotentiaries, be- 

 ing duly authorised thereto by their respective Governments have 

 signed the present Convention. 



DONE in quadruplicate at London, Mexico City, Moscow and 

 Washington, this twenty-ninth day of December, 1972. 



Annexes 



ANNEX I 



1. Organohalogen compounds. 



2. Mercury and mercury compounds. 



3. Cadmium and cadmium compounds. 



4. Persistent plastics and other persistent synthetic materials, for 

 example, netting and ropes, which may float or may remain in suspen- 

 sion in the sea in such a manner as to interfere materially with fishing, 

 navigation or other legitimate uses of the sea. 



5. Crude oil, fuel 'oil, heavy diesel oil, and lubricating oils, hydraulic 

 fluids, and any mixtures containing any of these, taken on board for 

 the purpose of dumping. 



6. High-level radio-active wastes or other high-level radio-active 

 matter, defined on public health, biological or other grounds, by the 

 competent international body in this field, at present the Interna- 

 tional Atomic Energy Agency, as unsuitable for dumping at sea. 



