Key legal question
Whether the tenant had to first submit a written rent-reduction request to the landlord under Art. 270a(2) OR before filing the conciliation/court proceedings.
Extracted holding
Yes. The prior party-internal procedure is generally a mandatory procedural prerequisite unless a statutory exception applies.
Extracted reasoning
The Court held that Art. 270a(2) OR is a process prerequisite, not merely an internal formality. The exception in Art. 270a(3) OR cannot be expanded broadly; mere prior disputes or pending litigation do not make the prior procedure futile.