Kernrechtsfrage
Whether the lease allowed subletting without the landlord's written consent
Extrahierter Entscheid
No. The contract, interpreted according to the parties' actual common intent, required prior written consent for subletting.
Extrahierte Begründung
The lower court's factual finding that the parties intended to keep Article 12 of the standard form unchanged was not arbitrary. The lease text and surrounding circumstances did not justify departing from the written consent requirement.