20.— (1) The Authority may, with the approval of the Minister given with the consent of the Minister for Public Expenditure and Reform—

(a) appoint such and so many persons to be members of the staff of the Authority as it may determine, and

(b) determine the grades of such staff of the Authority and the number of staff in each grade.

(2) Section 19(3)(a) shall apply to an appointment under this section.