Kernrechtsfrage
Whether the appointment of the sole arbitrator could be challenged for institutional dependence under Art. 19 KSG, and whether the cantonal court had to examine that objection immediately.
Extrahierter Entscheid
Institutional grounds for challenge under Art. 19 KSG had to be examined at once; the court's refusal to address them violated the concordat.
Extrahierte Begründung
A party may invoke not only personal but also institutional grounds showing that one side had exerted predominant influence over the arbitrator's appointment. Such objections must be raised without delay, and the right to challenge is forfeited if not timely asserted; therefore they cannot be deferred to enforcement. The appellant's submissions were sufficiently specific.