This Tariff Concession Order (TCO 1100391) declares that specific imported goods — "gas stacks" for submerged arc furnaces, including ducts and gas stack caps (tariff line 7326.90.90) — are covered by item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995. The declaration is made by a delegate under s269P of the Customs Act 1901 and took effect on 4 January 2011. Importers can rely on the Schedule 4 concession; the concession may be revoked under ss269SC/269SD, and customs will verify correct classification and description.