This Tariff Concession Order (0516772), made under s.269P of the Customs Act 1901, applies Part III Schedule 4 item 50 of the Customs Tariff Act 1995 to “weld test rings complying with DNV‑OS‑F101” (7305.39.00) from 8 December 2005 until revoked under ss.269SC/269SD. Mechanically, it changes which Schedule 4 tariff treatment applies to those imported goods. It therefore affects importers and customs administration by altering the tariff treatment that must be applied; the delegate issuing the Order decides its application and revocation.