Tariff Concession Order 0606999 (effective 13 Apr 2006) declares that a specific type of heavy off‑highway articulated rear‑dump truck (tariff classification 8704.10.00: 4x4, spiral‑bevel differential, payload ≥50 tonnes, max speed ≤40 km/h) is to be treated as falling under Schedule 4 Item 50 of the Customs Tariff Act 1995. Made under s269P of the Customs Act 1901 by a delegate of the CEO, it changes customs duty treatment for importers of those trucks until revoked under ss269SC/269SD; importers must meet the listed specifications to qualify.