This Order attaches Item 50 of Part III of Schedule 4 to the Customs Tariff Act 1995 to a narrowly described class of evaporators (continuous, centrifugal vacuum, heat‑transfer area not greater than 2.79 m2) classified at 8419.89.90. It takes effect from 19 November 2010 and remains in force until revoked under sections 269SC or 269SD; the declaration was made under s269P by a delegate of the Chief Executive Officer. Mechanically, it changes which tariff concession item applies to those imports, affecting importers' duty treatment and classification obligations.