Judgment of the Court (Grand Chamber) of 22 September 2020.#Cali Apartments SCI and HX v Procureur général près la cour d'appel de Paris and Ville de Paris.#References for a preliminary ruling – Directive 2006/123/EC – Scope – Repeated short-term letting of furnished premises to a transient clientele which does not take up residence there – National legislation imposing a prior authorisation scheme for certain specific municipalities and making those municipalities responsible for defining the conditions for granting the authorisations provided for by that scheme – Article 4(6) – Concept of ‘authorisation scheme’ – Article 9 – Justification – Insufficient supply of affordable long-term rental housing – Proportionality – Article 10 – Requirements relating to the conditions for granting authorisations.#Joined Cases C-724/18 and C-727/18.