195 2. Part XV applies mutatis mutandis to any dispute between Parties to this Convention, one or more of which are international organizations. 3. When an international organization and one or more of its member States are joint parties to a dispute, or parties in the same interest, the organization shall be deemed to have accepted the same procedures for the settlement of disputes as the member States; when, however, a member State has chosen only the International Court of Justice under article 287, the organization and the member State concerned shall be deemed to have accepted arbitration in accordance with Annex VII, unless the parties to the dispute otherwise agree. Article 8 Applicability of Part XVII Part XVII applies mutatis mutandis to an international organization, except in respect of the following: (a) the instrument of formal confirmation or of accession of an international organization shall not be taken into account in the application of article 308, paragraph l; (b) (i) an international organization shall have exclusive capacity with respect to the application of articles 312 to 315, to the extent that it has competence under article 5 of this Annex over the entire subject-matter of the amendment; (ii) the instrument of formal confirmation or of accession of an international organization to an amendment, the entire subject-matter over which the international organization has competence under article 5 of this Annex, shall be considered to be the instrument of ratification or accession of each of the member States which are States Parties, for the purposes of applying article 316, paragraphs 1, 2 and 3; (iii) the instrument of formal confirmation or of accession of the international organization shall not be taken into account in the application of article 316, paragraphs 1 and 2, with regard to all other amendments; (c) (i) an international organization may not denounce this Convention in accordance with article 317 if any of its member States is a State Party and if it continues to fulfil the qualifications specified in article 1 of this Annex; (ii) an international organization shall denounce this Convention when none of its member States is a State Party or if the international organization no longer fulfils the qualifications specified in article 1 of this Annex. Such denunciation shall take effect immediately.