6. Where a vacancy arises in the membership of a National Park authority, it must be filled as soon as possible—
(a)where the vacancy is for a local authority member, by the council in whose representation the vacancy arises; and
(b)where the vacancy is for a member appointed by the Secretary of State, by the Secretary of State, after consultation with Natural England where the appointment falls to be made in accordance with paragraph 4 of Schedule 7 to the 1995 Act (members other than parish members appointed by the Secretary of State).