Artikel 6

(a). If a vacancy occurs in the tribunal for reasons which the president or the remaining members of the tribunal decide are beyond the control of the disputants, or are compatible with the proper conduct of the arbitration proceedings, the vacancy shall be filled in accordance with the following provisions:
(i) if the vacancy occurs as a result of the withdrawal of a member appointed by a side to the dispute, then that side shall select a replacement within ten days after the vacancy occurs;
(ii) if the vacancy occurs as a result of the withdrawal of the president of the tribunal or of another member of the tribunal appointed by the chairman, a replacement shall be selected from the panel in the manner described in paragraph (c) or (b) respectively of Article 5 of this Annex.
(b). If a vacancy occurs in the tribunal for any reason other than as described in paragraph (a) of this Article, or if a vacancy occurring pursuant to that paragraph is not filled, the remainder of the tribunal shall have the power, notwithstanding the provisions of Article 2 of this Annex, upon the request of one side, to continue the proceedings and give the final decision of the tribunal.