Artikel 57

(a). Without prejudice to the provisions of Article 56 and of Section (b) of this Article, any dispute between the Agency and a member or an agency thereof and any dispute between the Agency and a country (or agency thereof) which has ceased to be a member, shall be settled in accordance with the procedure set out in Annex II to this Convention.
(b). Disputes concerning claims of the Agency acting as subrogee of an investor shall be settled in accordance with either (i) the procedure set out in Annex II to this Convention, or (ii) an agreement to be entered into between the Agency and the member concerned on an alternative method or methods for the settlement of such disputes. In the latter case, Annex II to this Convention shall serve as a basis for such an agreement which shall, in each case, be approved by the Board by special majority prior to the undertaking by the Agency of operations in the territories of the member concerned.