Case C-650/21, Landespolizeidirektion Niederösterreich and Finanzamt Österreich: Judgment of the Court (Second Chamber) of 20 April 2023 (request for a preliminary ruling from the Verwaltungsgerichtshof — Austria) — FW, CE (Reference for a preliminary ruling — Social policy — Equal treatment in employment and occupation — Directive 2000/78/EC — Prohibition of discrimination on grounds of age — Remuneration of civil servants — Previous national legislation found to be discriminatory — Grading under a new system of remuneration by reference to seniority fixed under a previous system of remuneration — Correction of that seniority by determining a comparison reference date — Discriminatory nature of the new grading — Rule placing older officials at a disadvantage)