This Tariff Concession Order (TCO 1054348) declares that a specific valve — “valves, slide and/or slide gate, dust discharge, blast furnace” (tariff heading 8481.80.90) — is a good to which Part III, Schedule 4, item 50 of the Customs Tariff Act 1995 applies, effective 13 December 2010 until revoked (s.269P; revocation s.269SC–269SD, Customs Act 1901). Mechanically, it changes the import tariff treatment for those valves; importers must claim the concession when lodging entries and face administrative revocation risk.