Mechanically, this Order (under s.269P of the Customs Act 1901) applies the Part III, Schedule 4 tariff concession (Item 50) to a narrowly defined imported product: class A power fuses (HS 8535.10.00) that meet AS1033.1 1990, with voltage ≥12 kV and breaking capacity ≥10 kA, effective 25 Oct 2007 until revoked (ss.269SC/269SD). It affects importers and suppliers of those fuses by altering customs duty treatment (reducing or exempting the tariff), requires proof of the product specification and classification, and was made by a CEO delegate.