Judgment of the Court (Sixth Chamber) of 10 September 2020.#A v B and C.#Request for a preliminary ruling from the Rechtbank Amsterdam.#Reference for a preliminary ruling – Consumer protection – Directive 93/13/EEC – Annex, point 1(e) – Unfair terms in consumer contracts – Social housing – Obligation of residence and prohibition on subletting the property – Article 3(1) and (3) – Article 4(1) – Assessment of whether penalty clauses are unfair – Criteria.#Case C-738/19.