By the Charter of the United Nations the Secretariat is established as one of the six principal organs of the United Nations. The Secretary-General is designated ‘the chief administrative officer,’ not—be it noted—of the Secretariat but of the Organization. The Secretariat comprises the Secretary-General together with the staff appointed by him. The two institutions, the Secretariat and the Secretary-General, may well be regarded as distinct but inseparable—distinct in that the Charter confers in Articles 98 and 99 certain functions and powers specifically on the Secretary-General; inseparable in that the Secretariat is a unitary institution, organized on a functional basis, the members of which are ‘subject to the authority of the Secretary-General’ and ‘responsible to him in the exercise of their functions.’