Nationality of members 1.- Members of the Tribunal of the nationality of any of the parties to a dispute shall retain their right to sit as members of the Tribunal.
2.- If the Tribunal, when hearing a dispute, includes upon the bench a member of the nationality of one of the parties, any other party may choose a person to participate as a member of the Tribunal.
3.- If the Tribunal, when hearing a dispute, does not include upon the bench a member of the nationality of the parties, each of those parties may choose a person to participate as a member of the Tribunal.
4.- The provisions of this article shall apply to the chambers referred to in articles 14 and 15 of this Annex. In such cases, the President, in consultation with the parties, shall request specified members of the chamber forming the Tribunal, as many as necessary, to give place to the members of the Tribunal of the nationality of the parties concerned, and, failing such, or if they are unable to be present, to the members specially chosen by the parties.
5.- Should there be several parties in the same interest, they shall, for the purpose of the preceding provisions, be considered as one party only. Any doubt on this point shall be settled by the decision of the Tribunal.
6.- Members chosen in accordance with the provisions of paragraphs 2, 3 and 4 shall fulfill the conditions required by articles 2, 8 and 11 of this Annex. They shall participate in the decision of the Tribunal on terms of complete equality with their colleagues.
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