Joined Cases C-517/19 P and C-518/19 P: Judgment of the Court (Third Chamber) of 25 March 2021 — Maria Álvarez y Bejarano and Others v European Commission, Council of the European Union, European Parliament (Appeal — Civil service — Staff Regulations of Officials of the European Union — Reform of the Staff Regulations — Regulation (EU, Euratom) No 1023/2013 — New provisions relating to the annual reimbursement of travel expenses and the granting of travelling time — Link with expatriate status — Plea of illegality — Principles of equal treatment and of proportionality — Intensity of the judicial review)