This Tariff Concession Order (TCO 0944984) treats specified parts for oil/gas-well shock tools (listed) as goods to which item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995 applies, effective 26 Nov 2009. It was made under s.269P of the Customs Act 1901 by a delegate of the CEO (Paul Mercer) and continues until revoked under ss.269SC or 269SD. Importers must classify eligible goods under tariff heading 8431.43.00 to rely on the concession; the customs delegate decides continuance or revocation, creating an ongoing compliance and evidentiary duty.