This Order declares that a narrowly described class of trailer‑mounted mud pumps (single‑acting triplex pumps with diesel engines, right‑angle drives and a rockover chassis) classified at tariff heading 8413.50.10 are goods to which Part III of Schedule 4 to the Customs Tariff Act 1995 applies. It took effect on 7 August 2008 and continues until revoked. The practical effect is on importers of those pumps: it alters the customs treatment (and therefore duties or import costs) for goods that precisely match the written description.