Schedule 4 to the Principal Act is amended as follows:(a) by omitting item 8 from Division 2 of Part 1 ;(b) by inserting after item 20 in Division 2 of Part 1 the following:(c) by omitting item 13 from Division 1 of Part 2 ;(d) by inserting after item 17 in Division 1 of Part 2 the following:(e) by omitting item 48 from Division 1 of Part 2 ;(f) by omitting items 2B and 2C from Division 2 of Part 2 and substituting the following: