Kernrechtsfrage
Whether the lease termination notices violated the tenant's alleged option rights and were invalid under Art. 266a OR.
Extrahierter Entscheid
The option declarations were exercised too late; the leases therefore became ordinary leases terminable on six months' notice, and the terminations were valid.
Extrahierte Begründung
The contractual option had to be exercised within the agreed deadline, six months before the relevant fixed term expired. The factual finding that the written option declarations reached the landlords only in early October 2006 was binding, so no timely exercise occurred.