This Tariff Concession Order names specific parts for electrostatic precipitators (distribution irons or inlet screen supports) classified at tariff item 8421.99.00 and declares they fall under item 50 in Part III of Schedule 4 of the Customs Tariff Act 1995. It took effect on 6 August 2009 and continues until revoked under sections 269SC or 269SD of the Customs Act 1901. Mechanically, it changes the customs tariff treatment applied to those imported parts, so importers and customs agents must follow the treatment specified by the Order.