Mechanically, this Order applies Schedule 4, item 50 of the Customs Tariff Act 1995 to a specific imported good: retrievable downhole bridge plugs for oil and gas wells with a minimum pressure rating of 15,500 kPa, effective 5 Oct 2010, declared under s.269P of the Customs Act 1901 by a delegate of the CEO. It affects importers of those plugs by altering their customs tariff treatment (and therefore import cost and government revenue); compliance requires proving the goods meet the technical description and the concession can be revoked under ss.269SC/269SD.