This Order declares that specified blast-furnace parts (gate valves and sight-hole covers) are goods to which an Item in Part III of Schedule 4 of the Customs Tariff Act 1995 applies, making them eligible for the named tariff concession. It takes effect from 19 April 2006 and continues until revoked. Importers of these parts and customs officials are affected because the Order changes the tariff treatment and thus duties payable; the Chief Executive Officer’s delegate issued the Order and revocation powers lie in the cited Customs Act provisions.