Case C-645/18: Order of the Court (Sixth Chamber) of 19 December 2019 (request for a preliminary ruling from the Landesverwaltungsgericht Steiermark — Austria) — NE v Bezirkshauptmannschaft Hartberg-Fürstenfeld (Reference for a preliminary ruling — Article 99 of the Rules of Procedure of the Court — Freedom to provide services — Posting of workers — Article 56 TFEU — Directive 2014/67/EU — Articles 9 and 20 — Reporting of workers — Retention of records of wages — Penalties — Proportionality — Fines of a predefined minimum amount — Cumulative — No upper limit — Court fees)