This Tariff Concession Order (TCO 0617234) declares certain screening machines (tariff heading 8474.10.00 — screeners with hoppers, vibratory screens, conveyors, engines/motors, pumps, tanks, wheels/tracks) to be subject to Item 50 of Part III of Schedule 4 of the Customs Tariff Act 1995, effective 14 September 2006 until revoked. Mechanically, it changes how the customs tariff applies to those imported machines, affecting importers’ duty position. The declaration was made by a Customs delegate under the Customs Act and can be revoked under the Act’s revocation provisions.