31The Court has already held that that provision must be strictly interpreted, since it lays down an exception to the mechanism for reviewing the substance of unfair terms, such as that provided for by the system of consumer protection put in place by Directive 93/13 (judgments in Kásler and Káslerné Rábai, C‑26/13, EU:C:2014:282, paragraph 42, and Matei, C‑143/13, EU:C:2015:127, paragraph 49).
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