This Tariff Concession Order (TCO 0504697) declares that brazed, aluminium‑plated, finned multi‑stream heat exchangers for gas‑to‑gas service (tariff subheading 8419.50.90) are goods to which item 50 of Part III of Schedule 4 to the Customs Tariff Act 1995 applies, effective 26 April 2005 until revoked. The instrument was made by a delegate of the CEO under s.269P of the Customs Act 1901 (signed 16 Sept 2005). Mechanically, it changes the tariff treatment of those imports; importers face the compliance and any change in tariff cost, and revocation is by the Commissioner under ss.269SC–269SD.