This Order, made under s.269P of the Customs Act 1901, declares that imported goods classified at tariff heading 8419.89.90 — “coolers, air separation plant” (including water‑to‑air cooler, motor fans and expansion tanks) — are goods to which Item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995 applies, effective 30 September 2011. Mechanically, that changes the customs treatment of those imports while the Order remains in force and may be revoked under ss.269SC or 269SD; importers must identify the classification to rely on the Schedule 4 treatment.