Certification of sick leave: If some staff members as a matter of practice communicated directly with the MSD rather than through their mission, such practice does not detract from or modify written legislation.Recognised regional medical centres: A country in serious political, economic and security situation was unlikely to be the place to seek adequate medical treatment for an ailment recognised by the organization as a condition for medical evacuation. Recovery of overpayment: The United Nations being a humanitarian organization and in providing humanitarian assistance worldwide, needs to...