Regulations 2, 3 and 4 update references to documents containing information on the classification of imported goods (“commodity codes”). The documents add, simplify and replace commodity codes, update and correct descriptions and remove commodity codes that are no longer used in the United Kingdom’s tariff documents. They also add missing commodity codes in the authorised use documents. Finally, the documents reduce the rate of duty on a total of six commodity codes relating to aluminium road wheels and certain continuous filament glass fibre products (CGF).