Judgment of the Court (Fourth Chamber) of 3 December 2020.#Star Taxi App SRL v Unitatea Administrativ Teritorială Municipiul Bucureşti prin Primar General and Consiliul General al Municipiului Bucureşti.#Reference for a preliminary ruling – Article 56 TFEU – Applicability – Purely internal situation – Directive 2000/31/EC – Article 2(a) – Meaning of ‘Information Society services’ – Article 3(2) and (4) – Article 4 – Applicability – Directive 2006/123/EC – Services – Chapters III (Freedom of establishment for providers) and IV (Free movement of services) – Applicability – Articles 9 and 10 – Directive (EU) 2015/1535 – Article 1(1)(e) and (f) – Meaning of ‘rule on services’ – Meaning of ‘technical regulation’ – Article 5(1) – Failure to communicate in advance – Enforceability – Activity of connecting persons wishing to make urban journeys with authorised taxi drivers, by means of a smartphone application – Classification – National regulations subjecting that activity to prior authorisation.#Case C-62/19.