This Tariff Concession Order (made under s.269P of the Customs Act 1901) declares that specified sets of valve parts for blast‑furnace dust discharge valves (tariff classification 8481.90.90) fall under item 50 of Part III of Schedule 4 to the Customs Tariff Act 1995, effective 14 April 2011. The delegate of the CEO (Wendy Knowles) issued the order and it remains in force until revoked under ss.269SC or 269SD. Mechanically, importers of the listed parts receive the tariff concession (lower/zero duty) and must correctly classify goods to rely on it.