UNAT recalled that it has consistently held that Article 8(3) of the UNDT Statute must be read literally to prohibit UNDT from waiving the deadlines for seeking management evaluation and that UNDT has no jurisdiction or competence to waive such deadlines. UNAT held that ignorance of the law is no excuse and, while it was unfortUNATe that Mr. Nianda-Lusakueno relied on the informal review procedure, such reliance did not qualify as exceptional circumstances under ICAO Staff Rule 111. 1, paragraph 8. UNAT dismissed the appeal and affirmed the decision of the Secretary-General of ICAO.