Mechanically, this Tariff Concession Order (TCO) declares that specific goods—"parts, synchrotron beamline, being mirror manipulators" (tariff classification 8479.89.90)—are goods to which item 50 of Part III of Schedule 4 to the Customs Tariff Act 1995 applies, made under s.269P of the Customs Act 1901. It took effect 20 Dec 2006 and continues until revoked under ss.269SC or 269SD. Importers of these parts can rely on the Schedule 4 item when importing; the exact tariff consequence requires checking item 50 in Schedule 4.