Case C-914/19: Judgment of the Court (Second Chamber) of 3 June 2021 (request for a preliminary ruling from the Consiglio di Stato — Italy) — Ministero della Giustizia v GN (Reference for a preliminary ruling — Social policy — Principle of equal treatment in employment and occupation — Directive 2000/78/EC — Article 6(1) — Charter of Fundamental Rights of the European Union — Article 21 — Prohibition of all discrimination on the basis of age — National legislation setting 50 years of age as the age limit for access to the profession of notary — Justification)