This Tariff Concession Order applies Schedule 4 item 50 to a narrowly defined set of brass gate valves (tariff heading 8481.80.90) that are manually operated, have a screwed‑in bonnet and a BSP diameter between 12.7 mm and 50.8 mm. The concession took effect on 26 March 2010 and remains until revoked.
Importers bear the change in duty treatment; the order was made by a delegate under section 269P of the Customs Act 1901. It alters import costs and sourcing incentives and requires correct tariff classification and size measurement for compliance.