Mechanically, this Tariff Concession Order treats specified synchrotron parts — vacuum chambers and vacuum chambers with magnets — as falling under item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, effective 9 June 2005 until revoked under sections 269SC or 269SD. It affects importers of those parts by changing their tariff treatment (import duty applicability). The order was made by a delegate of the CEO under section 269P; importers must correctly classify goods and rely on the order to claim the concession.