This Order declares that a container-mounted reverse osmosis filtration plant (including reverse-osmosis pressure vessels and pumps), classified at 8421.21.90, is a good to which an item in Part III of Schedule 4 to the Customs Tariff Act 1995 applies, effective 16 March 2011 until revoked. Mechanically, it changes the tariff treatment for importers of that specified equipment; who pays and the amount of duty relief depend on the Schedule 4 item applied and revocation is by the delegate under sections 269SC/269SD.