This Tariff Concession Order (TC 0712195) declares that polyester-and-wool two‑fold yarns (tariff classification 5509.52.00) are goods to which Item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995 applies, effective 2 Aug 2007 until revoked. The declaration was made by a delegate under s269P of the Customs Act 1901; revocation may occur under ss269SC or 269SD. Mechanically, it changes those imports' tariff treatment under Schedule 4, so importers bear the direct compliance burden and duty effect and must monitor any revocation.