Tariff Concession Order 0906323 (made under s.269P of the Customs Act 1901) declares that specific track‑laying carrier vehicles with an integrated binder spreader — featuring a closed‑circuit hydraulic drive, a variable‑pitch distribution screw and adjustable dosing — are goods to which the item in Part III of Schedule 4 to the Customs Tariff Act 1995 applies. Effective 24 Feb 2009 until revoked, it changes the tariff treatment of those narrowly described imported machines and therefore affects importers and customs officials processing those imports.