Mechanically, this Order declares that electronic throttle control valves (tariff classification 8481.80.90) are goods to which item 50 of Part III, Schedule 4 of the Customs Tariff Act 1995 applies, effective 4 April 2006. (Made under s269P of the Customs Act 1901; revocable under ss269SC/269SD.)
It changes the import tariff treatment for those specific valves: importers gain the Schedule 4 concession, the Commonwealth foregoes corresponding tariff revenue, and Customs must confirm classification and eligibility on import.