Mechanically, this Order (made under s.269P of the Customs Act 1901) applies Part III Schedule 4 concession item 50 to a narrowly specified import: pneumatic struts (diameter ≥170 mm) for off‑highway rear dump trucks (classified 8708.80.99), effective 23 Dec 2010 until revoked (ss.269SC/269SD). Importers of these parts are affected because the tariff treatment under Schedule 4 now applies to their imports. The decision was made by a CEO delegate (Paul Mercer). Compliance requires correct classification and documentation; import sourcing and pricing incentives may change.