This Order declares piston rings for diesel engines (tariff classification 8409.99.10) to be goods covered by Item 50 of Part III of Schedule 4 to the Customs Tariff Act 1995, effective 18.03.10. It was made by a delegate under s269P of the Customs Act 1901 and continues until revoked under ss269SC or 269SD. Mechanically, it changes the tariff treatment facing importers of these piston rings (who bear any duty change) and vests decision and revocation authority in the CEO’s delegate and the Act’s revocation provisions.