Kernrechtsfrage
Whether the lease notice of 1 March 2007 was null or ineffective
Extrahierter Entscheid
The notice was neither null nor ineffective because it was served on the official form and complied with the contractual notice period and term.
Extrahierte Begründung
A nullity under Art. 266o CO was excluded, and no ineffectiveness was shown for an ordinary notice under Art. 266d CO.