This Tariff Concession Order (under s.269P of the Customs Act 1901) declares that “parts, electrolysis machine, being cathode head bars” (tariff code 8543.90.90) are goods to which item 50 in Part III of Schedule 4 applies, effective 7 March 2011 until revocation under ss.269SC/269SD or a specified date. It changes which Schedule 4 treatment applies to those imports, affecting importers and suppliers; administration and revocation rest with the CEO delegate, creating administrative discretion and a compliance obligation.