This Order applies a specific tariff-concession item (Item 50, Part III, Schedule 4 to the Customs Tariff Act 1995) to a narrowly defined class of hydraulic pressure cylinders (seamless, forged accumulator shells, 0.16–54 L and ≥20 MPa) from 29 January 2010 until revoked under ss 269SC/269SD. Mechanically, it lowers import tariff liability for importers of goods that meet the listed physical and tariff-classification criteria, shifts revenue away from the Commonwealth, and requires administrative verification that imports match the specification.