This order treats specified air‑navigation parts (antennas) classified under tariff code 8529.10.30 as subject to Item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995 (a tariff concession). It was made by a delegate of the CEO and takes effect from 19 September 2007 (see Order header and THE TABLE: Columns 1–2). Mechanically, the order changes the tariff treatment applied at import for those antenna parts, affecting importers' duty costs, compliance paperwork and eligibility to claim the Schedule 4 concession.