This Order declares that certain large pivoted swing‑disc and slide knife‑gate shut‑off valves (specified by size and type) are goods to which Schedule 4 item 50 of the Customs Tariff Act 1995 applies, effective 9 June 2006. Mechanically, it changes the tariff treatment applied to imports of those valves. It primarily affects importers, manufacturers and customs brokers: importers may claim the Schedule 4 treatment and bear the compliance tasks of correct classification and documentation. The Order is made under s.269P of the Customs Act 1901 and remains until revoked under ss.269SC–269SD.