90.— (1) A corporation shall, as well as appointing a director general, appoint such and so many persons to be members of the staff of the corporation as it may, from time to time, determine but, subject to subsection (2), a person shall not be appointed under this section to be a member of staff of the corporation unless he or she has been selected by means of a public competition.

(2) The requirement under subsection (1) of being selected by means of a public competition does not apply in relation to:

(a) an appointment consisting of the promotion of a person who is already a member of staff of the corporation,

(b) an office for which, in the opinion of the corporation, specialised qualifications not commonly held are required, or

(c) an office to which appointments are made for limited periods only, being periods not exceeding 2 years.

(3) A member of staff of a corporation shall hold his or her employment on such terms and conditions as the corporation from time to time determines.

(4) A corporation may perform any of its functions through or by any of its members of staff duly authorised by the corporation in that behalf.