This Tariff Concession Order (TCO 1011544), made under s.269P of the Customs Act 1901, declares specific wastewater sludge‑treatment centrifuges (tariff classification 8421.19.00 and listed components) to be goods covered by Part III, Schedule 4 item 50 of the Customs Tariff Act 1995. It takes effect 5 March 2010 and remains in force until revoked under ss.269SC or 269SD. Mechanically, it changes the tariff treatment importers must apply to those specified goods and requires importers to meet the listed description and classification when importing.