Case C-777/18: Judgment of the Court (Fourth Chamber) of 23 September 2020 (request for a preliminary ruling from the Szombathelyi Közigazgatási és Munkaügyi Bíróság — Hungary) — WO v Vas Megyei Kormányhivatal (Reference for a preliminary ruling — Social security — Sickness insurance — Regulation (EC) No 883/2004 — Article 20 — Scheduled treatment — Prior authorisation — Mandatory grant — Conditions — Insured person prevented from applying for prior authorisation — Regulation (EC) No 987/2009 — Article 26 — Assumption of costs of scheduled treatment incurred by the insured person — Procedure for reimbursement — Directive 2011/24/EU — Cross-border healthcare — Article 8(1) — Healthcare that may be subject to prior authorisation — Principle of proportionality — Article 9(3) — Processing of applications for cross-border healthcare — Factors to be taken into account — Reasonable time — Freedom to provide services — Article 56 TFEU)