This Order applies item 50 in Part III of Schedule 4 of the Customs Tariff Act 1995 to parts described as “hot blast valve, blast furnace, being spindle and nut assembly” (tariff heading 8481.90.90), effective 28.04.05 and continuing until revoked (Customs Act 1901 s.269P; revocation ss.269SC/269SD). It changes the tariff treatment that importers of those specific parts will face, so import costs and sourcing incentives may alter. Claiming the concession requires correct tariff classification and is subject to administrative discretion (delegate recorded).