International organizations — Officials — Contract of employment — Conclusion of contract — Offer of appointment accepted by applicant — Condition that applicant successfully complete medical examination — Director of medical department concerned about applicant's age — Decision to withdraw offer of appointment — Whether reasonable — Whether Tribunal should overturn medical judgment

International tribunals — International administrative tribunals — World Bank Administrative Tribunal — Jurisdiction — Whether contract of employment ever concluded an issue — Whether within jurisdiction of Tribunal — Review of decisions — Circumstances in which Tribunal should overturn decision