see this article in the full MAL
article 16. Competence of arbitral tribunal to rule on its jurisdiction
(3) The arbitral tribunal may rule on a plea referred to in paragraph (2) of this article either as a preliminary question or in an award on the merits. If the arbitral tribunal rules as a preliminary question that it has jurisdiction, any party may request, within thirty days after having received notice of that ruling, the court specified in article 6 to decide the matter, which decision shall be subject to no appeal; while such a request is pending, the arbitral tribunal may continue the arbitral proceedings and make an award.
SEE ALSO THE SEPARATE ENTRIES FOR THE OTHER SECTIONS OF THIS ARTICLE.