The Stockholm Convention on Persistent Organic Pollutants was adopted at a Conference of Plenipotentiaries on 22 May 2001 in Stockholm, Sweden. The Convention entered into force on 17 May 2004, ninetieth day after the date of deposit of the fiftieth instrument of ratification, acceptance, approval or accession in respect of the Convention.
Article 18 of the Convention requires the Conference of the Parties to adopt arbitration and conciliation procedures to govern the settlement of disputes between Parties to the Convention. At its first meeting held in Punta del Este, Uruguay from 2 to 6 May 2005, the Conference of the Parties adopted decision SC-1/2, by which it established such procedures. The procedures are set out in Annex G, which entered into force on 27 March 2007 (Reference: C.N.1017.2007.TREATIES-14).
At its fourth meeting held in Geneva from 4 to 8 May 2009, the Conference of the Parties adopted amendments to Annexes A, B and C by decisions SC-4/10, 4/11, 4/12, 4,/13, 4/14, 4/15, 4/16, 4/17 and 4/18 to list additional nine chemicals in the respective annexes: alpha hexachlorocyclohexane; beta hexachlorocyclohexane; chlordecone; hexabromobiphenyl; hexabromodiphenyl ether and heptabromodiphenyl ether; lindane; pentachlorobenzene; perfluorooctane sulfonic acid, its salts and perfluorooctane sulfonyl fluoride; and tetrabromodiphenyl ether and pentabromodiphenyl ether. The amendment was communicated by the depositary to all Parties on 26 August 2009 (Reference: C.N.524.2009.TREATIES-4).
At its fifth meeting held in Geneva from 25 to 29 April 2011, the Conference of the Parties adopted an amendment to Annex A by decision SC-5/3 to list technical endosulfan and its related isomers in the annex. The amendment was communicated by the depositary to all Parties on 27 October 2011 (Reference: C.N.703.201.TREATIES-8).
In accordance with paragraphs 3 (b) and 3 (c) and paragraph 4 of Article 22 of the Convention, any Party that is unable to accept an amendment to Annex A, B or C shall so notify the depositary, in writing, within one year from the date of communication by the depositary of the adoption of the amendment. The depositary shall without delay notify all Parties of any such notification received. A Party may at any time withdraw a previous notification of non-acceptance in respect of any amendment to Annex A, B or C, and the amendment shall thereupon enter into force for that Party subject to paragraph 3 (c) of Article 22. On the expiry of one year from the date of the communication by the depositary of the adoption of the amendment to Annex A, B or C, the amendment shall enter into force for all Parties that have not submitted a notification in accordance with the provisions of paragraph 3 (b) of Article 22.
In accordance with paragraph 4 of Article 22, an amendment to Annex A, B or C shall not enter into force with respect to any Party that has made a declaration with respect to any amendment to those Annexes in accordance with paragraph 4 of Article 25, in which case any such amendment shall enter into force for such a Party on the ninetieth day after the date of deposit with the depositary of its instrument of ratification, acceptance, approval or accession with respect to such amendment.