UNAT considered an appeal by the Secretary-General. On the question of whether UNDT erred in finding that the five years’ experience requirement was arbitrary and not based on any proper consideration, UNAT held that, absent any proper legal or factual basis upon which to impugn the five years’ experience requirement, UNDT had no function in substituting its judgment for that of the Administration in determining the criteria for the selection of S-3 officers, and in doing so, UNDT erred in law resulting in a manifestly unreasonable decision. UNAT held that UNDT erred in law in deeming the...