Mechanically, this Order declares that specified downhole surface‑actuated flow‑control valves (tariff 8481.80.90) are covered by item 50, Part III, Schedule 4 of the Customs Tariff Act 1995 from 9 Sep 2010 until revoked. It affects importers of those valves by making them eligible for the Schedule 4 concession (reducing or removing duty), shifts tax cost from importers to the Treasury, requires correct tariff classification and records, and creates an incentive to import rather than source domestically.