This Tariff Concession Order (TCO 0818895) declares that alloy‑steel bars classified 7228.30.10, with diameters between 21 mm and 24 mm, are to be treated under item 50 of Part III of Schedule 4 to the Customs Tariff Act 1995 from 15 July 2008 (made under s269P; revocable under ss269SC/269SD). Mechanically, it changes the tariff treatment for importers of those specific bars; importers must correctly classify shipments to obtain the Schedule 4 treatment and bear the associated compliance and classification risk.