18.—(1) Article 28 (power to vary Schedules) is amended as follows.
(2) In paragraph (1) for “Schedules 1” substitute “Schedules A1”.
(3) In paragraph (4)—
(a)for “this Part” substitute “Part 2”;
(b)in sub-paragraph (a) for “or Schedule 6” substitute “, Schedule 6 or Schedule 7”.