This order (TCO 0619399) declares that goods described as “silencers, door closing” (tariff heading 8302.42.00) attract Item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, effective 8 Dec 2006 until revoked under the Customs Act (s.269P; ss.269SC–269SD). Mechanically, it lets importers claim a tariff concession for those goods; the Commonwealth forgoes tariff revenue, importers must rely on the correct tariff classification to claim the concession, and a delegate administers and may revoke it.