Tariff Concession Order (TCO 0713174) treats pleated oil-and-gas drilling filter cartridges (Customs code 8421.29.00) as goods covered by Item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, effective 17 August 2007. Mechanically, it lets importers claim the Schedule 4 concession for those goods until the order is revoked. Who decides and who pays: the CEO’s delegate made the order under s.269P; importers receive the tariff benefit but must correctly classify goods and bear administrative risk if Customs disputes claims (ss.269SC–269SD).