This Tariff Concession Order (TCO) declares that weld test rings (classified 7304.31.00) that comply with DNV‑OS‑F101 are goods to which Item 50 of Part III of Schedule 4 to the Customs Tariff Act 1995 applies. The declaration was made under section 269P of the Customs Act 1901, takes effect from 08.12.2005 and continues until revoked under sections 269SC or 269SD. It therefore changes the tariff treatment for importers of those specific rings and requires conformity with the stated technical standard.