This Tariff Concession Order (TCO 0937558) declares specific stacker-crane parts (top wheels, side guide rollers, trailer wheels, fork unit racks, trolley brackets) classified at 8431.39.00 are goods to which Part III Schedule 4 item 50 of the Customs Tariff Act 1995 applies (under s269P). It took effect 6 Oct 2009 and continues until revoked (ss269SC/269SD). Mechanically, it changes the customs-duty treatment available to importers of those parts; the delegate issued the order and importers must correctly classify goods to rely on the concession.