Question juridique clé
Whether the lease termination for non-payment of rent was contrary to good faith under Art. 271(1) CO.
Solution extraite
The termination was not abusive; the landlord's conduct was not contradictory or chicanery, and no special circumstances justified annulment.
Motifs extraits
The tenants knew the outstanding amounts; the indexed rent increase notice sent before expiry of the grace period did not signal waiver of the default notice, but merely applied the contractual indexation clause. The landlord could legitimately expect payment before the deadline.