European Court of Justice allows appeal to proceed in part in EU mission staff case
14 October 2026
Garden Court North’s Antje Kunst represented DT at the European Court of Justice (pictured). Credit: Alexandros Michailidis / Shutterstock.
The Court of Justice of the European Union has allowed an appeal by ‘DT’, represented by Garden Court North’s Antje Kunst, against EULEX Kosovo to proceed in part, recognising the wider significance of questions concerning the judicial protection of staff serving in the European Union’s Common Security and Defence Policy (CSDP) missions.
In its order of 6 October 2026, the Court held that the first ground of appeal, the first part of the second ground of appeal, and the third ground of appeal raise issues significant to the unity, consistency or development of EU law. The appeal challenges a judgment of the General Court concerning the termination of DT’s employment contract, following the abolition of his post under a revised deployment plan for EULEX Kosovo.
The appeal will proceed on three key issues:
- Judicial review of decisions to abolish posts in EU missions.
Whether decisions concerning the reorganisation of a CSDP mission and the abolition of staff posts fall outside the jurisdiction of the EU Courts because they are directly linked to ‘strategic choices’ under the Common Foreign and Security Policy (CFSP), as the General Court held, or whether they should instead be treated as administrative management decisions subject to judicial review. The Court will also have to address whether the abolition of a post may be challenged incidentally in proceedings against the subsequent termination of an employment contract, or whether a separate action is required.
- The duty of care owed to mission staff.
Whether the General Court erred in holding that EULEX Kosovo was required to take into consideration only the interests of the service, and whether the mission’s ‘temporary nature’ and the specific conditions governing the employment of mission staff exempt it from obligations recognised in the case-law on EU officials and other staff, including any obligation to consider reassignment.
- Equal treatment and effective judicial protection.
Whether the General Court’s approach is consistent with Articles 20, 21 and 47 of the Charter of Fundamental Rights of the European Union, including whether, in light of the principle of equal treatment, provisions of the EU Staff Regulations and related case-law should be applied by analogy to CSDP mission staff in comparable situations, and whether decisions concerning the abolition of posts in CSDP missions may be excluded from judicial review.
Wider implications for the judicial protection of CSDP mission staff
The resolution of these questions could have implications beyond the individual dispute for the legal framework governing CSDP mission staff.
It may help define the boundary between ‘strategic choices’ falling outside the jurisdiction of the EU Courts and administrative decisions subject to judicial review, clarify the extent to which provisions of the EU Staff Regulations and related case-law apply to CSDP mission staff, and strengthen legal certainty regarding the employment rights and judicial protection of mission staff.
The order does not determine the merits of the appeal. It permits the proceedings to continue in relation to the first ground, the first part of the second ground and the third ground of appeal. The second part of the second ground, concerning the alleged breach of the principle of legitimate expectations, was not allowed to proceed.
By allowing the appeal to proceed in part, the Court of Justice has provided an opportunity to clarify important questions concerning the legal protection of EU mission staff and the consistent application of EU law, following the Order of 6 October 2026, DT v EULEX Kosovo, C-122/26 P, as outlined by Antje in her recent feature article for EU Law Analysis.
Antje represents DT. She is a member of Garden Court North’s international team.
Additional media
Court of Justice – In Case C‑122/26 P
InfoCuria – DT v EULEX Kosovo, C-122/26 P
EU Law Analysis – How the New Appeal Filtering Mechanism in the EU Courts Affects Judicial Review of CSDP Missions
For further information, please contact Alex Blair, Communications Manager at Garden Court North Chambers: ablair@gcnchambers.co.uk
