Mechanically, this Order (made under s269P of the Customs Act 1901) declares that certain air separators—specifically nitrogen generators and carbon dioxide scrubbers classified at 8421.39.00—are goods to which item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995 applies. It takes effect from 6 March 2009 and remains in force until revoked under ss269SC or 269SD.
It affects importers of those machines (who may claim the Schedule 4 concession) and is issued by a delegate of the Chief Executive Officer; importers must meet Customs classification and claiming requirements.