This Order (TCO 0930935) declares that assembled wastewater odour control plants (tariff classification 8421.39.00) — comprising scrubbers, ducts, fans, chemical dosers, filters, stacks, electrical instrumentation/modules or controllers, tanks and odour controllers — are goods to which item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995 applies. It took effect 24 Aug 2009 and continues until revoked under the Customs Act (ss.269P, 269SC–269SD).
Mechanically, the declaration changes the tariff treatment importers face for these assembled plants; the order was made by a delegate of the CEO and remains in force unless revoked.