This Tariff Concession Order (No. 1129154) declares a class of mobile SCREENERS (customs classification 8479.82.00, described by listed components) to be subject to item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, effective 25 August 2011 (s.269P; Schedule 4 item 50; ss.269SC–269SD).
Mechanically, it changes who pays import duty for those machines: importers who meet the product description may obtain the Schedule 4 treatment decided by a customs delegate, and compliance depends on fitting the precise tariff description.