This Order (made under s269P of the Customs Act 1901) applies Part III, Item 50 of Schedule 4 to the Customs Tariff Act 1995 to goods tariff‑classified at 8480.79.00 described as “mould blocks, corrugated plastic pipe”. It commenced 26 March 2007 and continues until revoked (ss269SC/269SD). Mechanically, it permits importers to claim the Schedule 4 concession (changing duty treatment), so importers pay reduced or altered customs duty and the Commonwealth foregoes that revenue. The CEO’s delegate (Wendy Knowles) made the decision; compliance hinges on correct tariff classification.