This order applies Schedule 4, item 50 of the Customs Tariff Act 1995 to imports of a specific wool worsted yarn (tariff heading 5107.10.00) that is not greater than 20 microns and has a metric count of at least 27/1, effective 24 July 2007. A delegate under section 269P declared the concession; importers whose shipments meet the physical specifications can claim the Schedule 4 treatment (reducing customs duty). The concession remains until revoked under sections 269SC or 269SD, so importers must document compliance and monitor any administrative revocation.