Tariff Concession Order 0711991 applies item 50 of Part III, Schedule 4 of the Customs Tariff Act 1995 to an imported warehouse storage-and-retrieval system (tariff heading 8428.90.00) comprising stacker cranes, basket underframes, programmable logic controllers, barcode readers, conveyors and weighers, effective 25 July 2007 until revoked. Declared under s.269P of the Customs Act 1901 by a CEO delegate with revocation under ss.269SC/269SD, it alters the tariff treatment importers receive and requires customs classification to claim that treatment.