Questão jurídica principal
Whether the arbitral tribunal had jurisdiction over claims by non-signatory companies under the arbitration clause.
Decisão extraída
The appeal did not validly challenge all independent reasons supporting the tribunal's jurisdictional finding, so the challenge could not succeed.
Fundamentação extraída
The tribunal had relied on two separate grounds. The appellant attacked only one of them, while the other independent ground remained unchallenged. A party must contest each sufficient alternative reason, otherwise the complaint is inadmissible.