Case T-119/17 RENV: Judgment of the General Court of 12 May 2021 — Alba Aguilera and Others v EEAS (Civil service — Officials — Temporary agents — Contract staff — Remuneration — EEAS staff posted to a third country — Article 10 of Annex X to the Staff Regulations — Annual assessment of allowance for living conditions — Decision on reduction of the allowance for living conditions for staff posted to Ethiopia from 30 to 25 % — Regional coherence — Manifest errors of assessment)