Mechanically, this Order declares that "in-line poultry cut-up weighers" (tariff code 8423.20.00) are subject to item 50 of Part III, Schedule 4 to the Customs Tariff Act 1995 from 6 December 2005, changing their customs duty treatment. It affects importers of that specific machinery by altering which tariff concession applies and remains in force until revoked under sections 269SC or 269SD of the Customs Act 1901.
The primary cost falls on importers (through duty outcomes and compliance), and administration and discretion lie with Customs under the cited statutory provisions.