This Tariff Concession Order names specific imported machinery — “haul-off machines, plastic pipe extrusion line” (customs classification 8428.90.00) — and declares that they are subject to item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995. The declaration was made by a delegate under section 269P, takes effect from 15 August 2011, and remains in force until revoked under sections 269SC or 269SD. Importers of the listed goods are the primary parties affected because the Order changes how those goods are treated under Schedule 4.