Applies a Schedule 4 tariff concession (item 50) to imports classified as 4012.90.00 — solid‑cushion mining earthmover tyres with diameter not less than 120 cm — effective 16 August 2006 until revoked (ss.269SC/269SD). It changes customs treatment for importers of those tyres by making the Schedule 4 item applicable rather than the standard tariff. The measure was made by a delegate of the CEO under s.269P (Wendy Knowles), so importers gain the concession while revocation remains an administrative power.