This Tariff Concession Order (made under s.269P of the Customs Act 1901) declares that a narrowly defined refractory "tap‑hole filler" product (chemical specs and maximum grain size listed) is treated as falling under item 50 of Part III of Schedule 4 to the Customs Tariff Act 1995, effective 25 July 2005 until revoked. Mechanically, it changes how Customs classifies and applies tariff treatment to imports of that exact product. Importers and traders of the specified material must meet the listed composition and grain‑size tests to rely on the concession; the order was made by a delegate of the CEO.