This Tariff Concession Order declares that specific goods—"coolers and/or heat exchangers, lubrication oil, leveller gearbox" (tariff heading 8419.50.90)—are covered by item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, effective 21 March 2006 until revoked (under ss.269SC/269SD, as made under s.269P). Mechanically, it lets importers claim the Schedule 4 concession for those parts; the Commonwealth forgoes corresponding customs revenue and a delegate of the CEO controls application and revocation.