All appointments of the staff of every Institute, except that of the Director, shall be made in accordance with the procedure laid down in the Statutes, by—
(a)the Board, if the appointment is made on the academic staff in the post of 1[Assistant Professor or above] or if the appointment is made on the non-academic staff in every cadre the maximum of the pay scale for which exceeds prevalent grade pay scale for Group A Officers;
(b)the Director, in any other case.