This Order treats certain hydraulic power systems (tariff heading 8412.29.00) — described as including hydraulic cylinders, AC motors, converters, pumps, directional valves and reciprocating grates — as goods to which item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995 applies. Mechanically, that makes those imports eligible for the specified Schedule 4 concession from 17 September 2007 until revoked. It primarily affects importers and customs agents (who receive the duty concession), and was made by a delegate of the CEO of Customs.