This Tariff Concession Order applies Part III, Schedule 4 item 50 of the Customs Tariff Act 1995 to specified parts (inlet devices; perforated distribution baffles; plate pack coalescers; mesh pads) for medium‑pressure oil-and-gas separators classified at 8421.99.00. Mechanically, eligible imports are to be treated under that tariff concession from 29 August 2008 until revoked. Importers are the immediate beneficiaries (altered duty treatment); the order was made by a CEO delegate under s.269P and may be revoked under ss.269SC–269SD, creating classification, compliance and administrative discretion issues.