This Order declares that certain blast-furnace hopper parts (support wheel assemblies) classified under tariff line 8431.39.00 are covered by a Schedule 4 tariff concession (item 50), effective 21 July 2011 until revoked. It was made by a delegate of the CEO under s.269P of the Customs Act 1901. Mechanically, importers of the named parts can rely on the concession (reducing customs duty); the Commonwealth forgoes corresponding tariff revenue, and importers must correctly classify goods to claim the concession.