Kernrechtsfrage
Whether the arbitral tribunal had jurisdiction because the appellant was bound by the arbitration clauses as a contractual party rather than merely as a representative of C.________ SA.
Extrahierter Entscheid
The tribunal's jurisdiction was upheld because the contracts and surrounding conduct supported the view that A.________ SA was a party to the agreements and therefore bound by the arbitration clauses.
Extrahierte Begründung
The court accepted the tribunal's contextual interpretation under the reliance principle. The wording of the agreements, the appellant's role in requesting services, the invoicing and payments in its name, and the absence of a clearly manifested agency relationship supported party status; the court would not revisit the arbitral fact-finding.