This Order declares specific air-supply modules for passenger-train brake systems (including an oil-less compressor, valves, isolating cocks, a pressure switch and filters) to be eligible for Schedule 4 Part III item 50 tariff treatment. It takes effect from 26 March 2010 and continues until revoked under sections 269SC or 269SD of the Customs Act 1901.
Importers of those modules can obtain the Schedule 4 concession (reducing customs duty) if their goods match the description; Customs (the delegate) decides eligibility and may revoke the concession, so importers must prove compliance and keep records.