UNAT held that UNDT’s interpretation process, which led to the dismissal of the claim, was neither unreasonable nor unfair. UNAT noted that the affirmation that only the purchasing power element of comparison would allow an equal pay and treatment of staff members constituted only a postulation of a certain parameter among many possible options, without real support except in terms of policy selection because other criteria could also allow that kind of equal treatment, provided that they are applied in a general and non-discriminating way. UNAT noted that the comparator element adopted in the...