In Judgment No. 5201, delivered on 10 February 2026, the ILOAT was asked to review an earlier judgment. The application was dismissed. The Tribunal reaffirmed the familiar but unforgiving rule: its judgments are final, carry the authority of res judicata, and may be reviewed only in truly exceptional circumstances.
The reason is not mere procedural formalism. It is the logic of res judicata.
An application for review before the ILOAT cannot be an appeal in disguise. It is available only in exceptional circumstances: a failure to take account of material facts, a pure material error of fact, an omission to rule on a claim, or genuinely new facts that could not have been relied on earlier and could have affected the outcome.
That last point is crucial.
“New” does not mean newly emphasised.
It does not mean newly invoked or appreciated after an unfavourable judgment.
And it does not mean an opportunity to reargue the case with better framing.
Equally important is the distinction between a claim and a plea. Failing to rule on a claim may matter. Failing to address every argument does not reopen the case.
The practical lesson is simple, but unforgiving: before the ILOAT, the first round is usually the only round.
For international organisations and staff members alike, the case must be pleaded fully, precisely and evidentially from the start.
Review is not a safety net.
It is a narrow emergency exit.
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Bert Theeuwes is a Belgian lawyer and partner at Monard Law, where he heads the international civil service law practice. He is an expert with more than 25 years of experience advising international organizations worldwide on staff regulations, internal governance, employment-related disputes and best-practice compliance. His work focuses on helping international organizations align their internal rules with administrative-tribunal case law, modern HR standards and the practical realities of international public administration.
