Mechanically, this Order declares that container-mounted, hydraulic, diesel-powered slickline winches for oil and gas wells (tariff classification 8425.39.00) are covered by Schedule 4 item 50 of the Customs Tariff Act 1995, effective 12 September 2011 and continuing until revoked under sections 269SC or 269SD of the Customs Act 1901. That changes how import duty is applied to those winches: importers will be treated under the Schedule 4 concession; the order was made by a CEO delegate under s.269P.