If at any time not less than three months after the coming into force of the order under section 9(1) of this Act providing for the establishment of the Authority, or after a vacancy has arisen among the members of the Authority which falls to be filled by an appointment made under the said paragraph 1(a), the initial appointment of any member of the Authority falling to be made as aforesaid, or, as the case may be, an appointment to fill that vacancy, has not been made, the Minister, after consultation with the council or councils by whom the appointment falls to be made, may himself make the appointment on their behalf.