Case T-526/16: Judgment of the General Court of 14 December 2018 — FZ and Others v Commission (Civil service — Officials — Reform of the Staff Regulations — Regulation (EU, Euratom) No 1023/2013 — Types of posts — Transitional rules on grading in the types of posts — Article 30 of Annexe XIII to the Staff Regulations — Administrators in transition (AD 13) — Administrators (AD 12) — Promotion under Article 45 of the Staff Regulations only allowed within the career streams corresponding to the type of post occupied — Access to the type of post ‘Head of Unit or equivalent’ or ‘Adviser or equivalent’ exclusively in accordance with the procedure under Article 4 and Article 29(1) of the Staff Regulations — Equal treatment — Loss of eligibility for promotion to the next higher grade — Legitimate expectations)