Key legal question
Whether the extraordinary termination under Art. 257f CO was valid despite the tenant's later cure of the alleged breaches.
Extracted holding
The termination was invalid because the breaches were not sufficiently serious and, in any event, did not persist after the warning; the tenant restored the premises and stopped the disputed use.
Extracted reasoning
Art. 257f CO requires a serious, repeated breach that continues after written notice. The binding findings showed the tenant complied after the warning, so the cumulative conditions were not met.