This Tariff Concession Order (TCO 1044228) treats a specific imported part—leg cylinders for underground mining roof support machines (tariff classification 8479.90.00)—as goods covered by Part III, Schedule 4 item 50 of the Customs Tariff Act 1995, effective 29 Sep 2010 (made under s269P of the Customs Act 1901). Mechanically, importers pay the tariff treatment set out by item 50 instead of the default rate; the delegate (David Mulcair) declared the order and Customs applies or revokes it under ss269SC/269SD. This lowers import duty costs for those parts, affecting importers, downstream purchasers and competing local suppliers.