_____________

*  This period of time is doubled in an international arbitra­tion (art. 5(2)).

Article 9 - Plea as to Lack of Arbitration Agreement

1. A party who participated in the appointment of the arbi­trator(s) in the manner provided in the third section shall not be barred from raising the plea that the arbitral tribunal lacks jurisdiction on the ground that there is no valid arbi­tration agreement.