This means that the candidate will have to demonstrate within that time that he/she possesses the requisite qualifications to serve as a career staff member of the United Nations in order to receive such appointment.
Cela signifie que, pour bénéficier d &apos; un tel engagement, ils devront avoir fait la preuve qu &apos; ils possèdent les qualifications voulues pour occuper un poste de fonctionnaire de carrière à l &apos; ONU.