Case C-431/17: Judgment of the Court (Grand Chamber) of 7 May 2019 (request for a preliminary ruling from the Symvoulio tis Epikrateias — Greece) — Monachos Eirinaios, kata kosmon Antonios Giakoumakis tou Emmanouil v Dikigorikos Syllogos Athinon (Reference for a preliminary ruling — Directive 98/5/EC — Access to the profession of lawyer — Monk who has obtained the professional qualification of lawyer in a Member State other than the host Member State — Article 3(2) — Condition requiring registration with the competent authority of the host Member State — Certificate attesting to registration with the competent authority of the home Member State — Refusal to register — Rules of professional conduct — Incompatibility of the status of monk with practice of the profession of lawyer)