This Tariff Concession Order (TCO 1136059) declares that a narrowly described class of high‑voltage transformers (Customs heading 8504.34.00) meeting specified technical criteria are subject to item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, under s269P of the Customs Act 1901. It took effect 27 Oct 2011 and remains until revoked (s269SC/269SD).
Importers of those SF6‑insulated transformers can claim the Schedule 4 concession (affecting customs duty); importers must prove the transformers match the listed specifications for customs verification.