(3) The Arbitrator may determine that the parties are to submit additional written statements.

Article 18
Amendments to Claim or Defence

(1) A party may amend his claim or defence in the course of the proceedings if his case, as amended, is still comprised by the arbitration agreement, unless the Arbitrator considers it inappropriate having regard to the point of time at which the amendments is requested, the prejudice that may be caused to the other party or other circumstances.

(2) The provisions of Article 6 shall not preclude the preceding paragraph from being applied with respect to the right of a party to introduce a counterclaim or a set-off claim.

Article 19
Language

Unless the parties have agreed in the arbitration agreement on the language or languages to be used in the proceedings, the Arbitrator shall, after consultation with the parties, make such decision.