This order treats specified single‑screw extrusion lines for polyethylene piping (tariff heading 8477.20.00) as goods to which item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995 applies, effective 10 May 2006. Mechanically, that changes the customs-duty treatment for those imported machines and therefore the landed cost faced by importers and their customers. It primarily affects importers, suppliers and downstream manufacturers; compliance depends on correct classification under 8477.20.00 and the concession can be revoked under ss 269SC–269SD.