9.  Where a vacancy arises in the membership of the Panel, it must be filled as soon as is reasonably practicable—

(a)where the vacancy is created by either the chair of the Panel or one of the independent members appointed by the Welsh Ministers, by the Welsh Ministers in accordance with article 4 or 5,

(b)where the vacancy is created by one of the representative members, by the organisation in whose representation the vacancy arises.