This Tariff Concession Order (TCO 0802798) declares certain high‑voltage transformers (primary and secondary windings; primary or secondary voltage at least 500 kV; rating greater than 330 MVA) to be goods to which item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995 applies, effective 19 February 2008. Made under s.269P of the Customs Act 1901 by a CEO delegate, it stays in force until revoked under ss.269SC/269SD or a listed end date. Mechanically, it changes the customs tariff treatment for affected importers, altering duty exposure and claiming paperwork.