This Tariff Concession Order (TCO 0703295) declares that a specific aluminium-smelting product — “liners, pot shell” (with listed crane, trolley, clamping and feeder components) classified at 8479.89.90 — is covered by item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, effective 2 March 2007. Mechanically, that applies the named Schedule 4 tariff treatment to those imported goods; importers are the immediate parties affected and Customs administers the concession until the order is revoked (ss.269SC/269SD).