11. Schedule 6 to the Principal Act is amended—
(a) by omitting from the third column of item 1 “20” and substituting “30”;
(b) by omitting from the third column of item 2 “30” and substituting “50”;
(c) by omitting from the third column of item 3 “40” and substituting “70”;
(d) by omitting from the third column of item 4 “50” and substituting “80”;
(e) by omitting from the third column of item 5 “60” and substituting “100”;
(f) by omitting from the third column of item 6 “80” and substituting “130”;
(g) by omitting from the third column of item 7 “10” and substituting “20”; and
(h) by omitting from the third column of item 8 “20” and substituting “30”.