This Tariff Concession Order (TCO 1129188) declares that specific blast-furnace parts — “parts, clay or mud gun, blast furnace taphole, being swivel-joints” (HS 8479.90.00) — are subject to item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, effective 26 August 2011. Mechanically, that lets importers treat those goods under the listed Schedule 4 concession (potentially reducing or removing customs duty). The concession was made by a CEO delegate under s.269P of the Customs Act 1901 and may be revoked under ss.269SC or 269SD.