Case T-525/16: Judgment of the General Court of 14 December 2018 — GQ 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 31 of Annexe XIII to the Staff Regulations — Assistants in transition — Promotion under Article 45 of the Staff Regulations only allowed within the career streams corresponding to the type of post occupied — Access to the ‘senior assistant’ (AST 10) type of post 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)