This Tariff Concession Order (TCO 1107491) declares that steel pipe flanges described as "FLANGES, STEEL PIPE, including internal alumina ceramic tiles" (tariff classification 7307.91.00) are goods to which Item 50 of Part III of Schedule 4 to the Customs Tariff Act 1995 applies. It operates from 28 February 2011 and continues until revoked under sections 269SC or 269SD or any date specified. Mechanically, customs will treat imports matching that description as falling under Schedule 4 Item 50; importers must claim that treatment and customs will apply it for tariff purposes.