This Order applies item 50 of Part III of Schedule 4 of the Customs Tariff Act 1995 to a narrowly described good: regenerative thermal oxidisers (tariff classification 8419.89.90) with process flow not greater than 53,000 Nm3/hour, effective 22 June 2006 and continuing until revoked (s.269P; ss.269SC/269SD). Importers of those machines can claim the Schedule 4 concession; a customs delegate decides eligibility and importers/manufacturers must document capacity and classification, creating a modest compliance and verification task.