Case T-124/23: Judgment of the General Court of 8 May 2024 - VB v ECB (Civil service – ECB staff – Remuneration – Daily subsistence allowance – Refusal to grant the daily subsistence allowance – Articles 4.1.1 and 4.5.1 of the ECB Staff Rules – Legal certainty – Legitimate expectations – Duty to have regard for the welfare of officials – Responsibility)