Mechanically, this Order declares that specified roof‑tile handling machinery (lines, stacking and turning equipment with cranes, turners, conveyors and electronic controllers), classified at tariff heading 8428.90.00, is subject to the concession in Part III of Schedule 4 (item 50) of the Customs Tariff Act, effective 16 April 2008 and continuing until revoked under sections 269SC or 269SD. It therefore alters the customs duty treatment for importers of those machines and was made by a CEO delegate under s269P (TC 0804296).