Mechanically, this Tariff Concession Order declares that parts described as “rolls, continuous slab caster” (tariff code 8454.90.00) are goods to which Item 50 of Part III of Schedule 4 to the Customs Tariff Act 1995 applies, effective 24 March 2010 and continuing until revoked under ss.269SC or 269SD. It was made by Wendy Knowles under s.269P. Who pays: importers; who decides: the CEO’s delegate; the practical effect is to determine tariff treatment (and therefore duty) on import of the listed goods.