Key legal question
Whether the arbitral tribunal's non-binding suggestion on hypothetical party costs was an appealable arbitral decision.
Extracted holding
It was only an unverbindliche recommendation, not a binding arbitral disposition, so no admissible challenge lay against it.
Extracted reasoning
Only arbitral decisions can be appealed under Art. 77 BGG in conjunction with Arts. 389 ff. CPC; the dispositive wording showed a mere proposal, not a decision.