This Order (under s.269P, Customs Act 1901) declares that specific valve assemblies for blast‑furnace turbo‑blower blow‑off (tariff code 8481.80.90) are goods to which Part III, Schedule 4 Item 50 of the Customs Tariff Act 1995 applies, effective 20 January 2009 until revoked (ss.269SC/269SD). Mechanically, it alters the import tariff treatment available to importers of these assemblies; the Chief Executive Officer (by delegate) decides designation and revocation, and importers must classify and document goods to claim the treatment.