This Order declares that a specific imported part — roller-press roller tyres with a powder‑metallurgical hot isostatically pressed wear surface, classified at tariff 8474.90.00 — is covered by the Schedule 4 concession item (Item 50). It takes effect from 19 November 2008 and remains until revoked. The practical effect is to change tariff treatment for importers of that precise part, shifting duty liability and customs administration for those imports; the declaration was made by a delegate of the Chief Executive Officer.