(1) The parties may agree on the use of one or two languages to be used in the proceeding,provided that ifthey agree on any language that is not an official language of the Centre,the Tribunal,after con- sultation with the Secretary-General,gives its approval.If the parties do not agree on any such procedural language, each of them may select one of the official languages (i.e.,English,French and Spanish) for this purpose. Notwithstanding the foregoing, one of the official languages of the Centre shall be used for all communications to and from the Secretariat.

(2) If two procedural languages are selected by the parties, any instrument may be filed in either language.Either language may be used at the hearing subject, if the Tribunal so requires, to translation and interpretation.The orders and the award of the Tribunal shall be ren- dered and the record kept in both procedural languages,both versions being equally authentic.