International organizations — International administrative tribunals — United Nations Administrative Tribunal — Competence — Function in reviewing exercise of discretion regarding staff appointments

International organizations — Officials — Terms and conditions of employment — United Nations — Official seconded from government service — Meaning of secondment — Whether official has legitimate expectation that he will be given reasonable consideration if applying for a permanent appointment — United Nations General Assembly Resolution 37/126

International organizations — Officials — Independence — United Nations — Relationship between official and State of nationality — Official seconded from government service and seeking asylum — Whether official may be appointed to permanent post in United Nations without consent of State of nationality — Whether lack of consent a factor in refusing a permanent appointment in present case