Case T-169/17: Judgment of the General Court of 5 March 2019 — Pethke v EUIPO (Civil Service — Officials — Assignment — Reassignment of a Head of Service to a post of principal administrator — Article 7(1) of the Staff Regulations — Interests of the service — Equivalence of posts — Discrimination on grounds of sex — Proportionality — Action for damages — Inadmissibility — Failure to comply with the pre-litigation procedure)