Mechanically, this Order treats a narrow class of heavy‑vehicle transmissions (tariff classification 8708.40.49) — those with input torque >600 Nm, input power >140 kW and helical gearing — as goods covered by Part III, Schedule 4 item 50 from 08.10.10. That changes tariff treatment for importers of those transmissions (they qualify for the Schedule 4 concession); it was made by a CEO delegate under s.269P of the Customs Act 1901 and remains until revoked under ss.269SC or 269SD. Importers must satisfy customs that the goods meet the technical description to rely on the concession.