This Tariff Concession Order (TCO 0949287) declares that specific parts for oil and gas wells — described as agitators (oscillators) classified at 8431.43.00 — are subject to item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, effective 17 December 2009 until revoked (made under s.269P; revocation under ss.269SC/269SD). Mechanically, it exempts or reduces import duty for those listed goods, so importers pay lower customs charges and the Commonwealth forgoes corresponding tariff revenue; a delegate of the CEO (Michael Perry) issued the order.