Kernrechtsfrage
Whether the forum clause in the construction contract remained effective to exclude the Commercial Court's subject-matter jurisdiction after entry into force of the ZPO.
Extrahierter Entscheid
Article 406 ZPO governs only agreements on territorial jurisdiction; the old clause could not deprive the Commercial Court of its statutory subject-matter jurisdiction.
Extrahierte Begründung
The legislature adopted the former rule on forum agreements, which concerned only venue. Contractual prorogation cannot alter subject-matter jurisdiction, except where the law expressly allows a choice. The Commercial Court therefore was in principle competent for the claim against the client.