ii. promptly upon receipt of the reply containing such a proposal, the Claimant shall notify the Respondent whether it concurs in the appointment of the arbitrator proposed by that party to be the President of the Tribunal.

(2) The communications provided for in paragraph (1) of this Article shall be made or promptly confirmed in writing and shall either be transmitted through the Secretary-General or directly between the parties with a copy to the Secretary-General.

Article 11

Appointment of Arbitrators and Designation of President of Tribunal by the Secretary-General

(1) Promptly upon receipt of a request made by a party pursuant to Article 7(4) of these Rules, the Secretary-General shall send a copy thereof to the other party.