Case C-545/17: Judgment of the Court (Fourth Chamber) of 27 March 2019 (request for a preliminary ruling from the Sąd Najwyższy — Poland) — Mariusz Pawlak v Prezes Kasy Rolniczego Ubezpieczenia Społecznego (Reference for a preliminary ruling — Internal market of postal services — Directives 97/67/EC and 2008/6/EC — Article 7(1) — Definition of ‘exclusive or special rights for the establishment and provision of postal services’ — Article 8 — Right of the Member States to organise the registered mail service used in the course of judicial proceedings — Time-limit for lodging a procedural document before a court — Interpretation of national law in conformity with EU law — Limits — Direct effect relied on by an emanation of a Member State in proceedings between it and an individual)