Key legal question
Whether the arbitral tribunal had jurisdiction over the claim for unpaid invoices issued through C.Z.________
Extracted holding
Yes. The contract remained between the original signatories; C.Z.________ acted only as an auxiliary, so the arbitral clause covered the payment claim and the tribunal could determine who held the active standing.
Extracted reasoning
The invoices stemmed from the distribution agreement governed by English law; no novation or separate contract with C.Z.________ was established. The tribunal could decide whether the respondent was the true creditor or should fail for lack of standing.