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1. This Protocol shall be open for signature by States which are signatories to or Parties to the Convention and are either members of the Economic Commission for Europe or have been admitted to the Commission in a consultative capacity under paragraph 8 of the Commission”s terms of reference.
2. This Protocol shall be open for signature at Geneva from 27 to 30 May 2008 inclusive and after this date, at United Nations Headquarters in New York until 30 June 2009 inclusive.
3. This Protocol shall be subject to ratification by signatory States and open for accession by non-signatory States, referred to in paragraph 1 of this article, which are Parties to the Convention.
4. Such States as may participate in certain activities of the Economic Commission for Europe in accordance with paragraph 11 of the Commission”s terms of reference and which have acceded to the Convention may become Parties to this Protocol by acceding thereto after its entry into force.
5. Ratification or accession shall be effected by the deposit of an instrument with the Secretary-General of the United Nations.
6. Any instrument of ratification or accession, deposited after the entry into force of an amendment to this Protocol adopted in accordance with the provisions of Article 13 hereafter, shall be deemed to apply to the Protocol as modified by the amendment.