Mechanically, this Tariff Concession Order (TCO 0617947) declares that ‘‘vertical wick’’ drains (Customs Tariff classification 5603.13.00) are subject to Part III, Schedule 4, item 50 of the Customs Tariff Act 1995, effective 25 October 2006 (s.269P, Customs Act 1901). Practically, importers of the described drains can claim whatever treatment item 50 provides; the instrument was made by a delegate of the CEO (Wendy Knowles) and may be revoked under ss.269SC–269SD, so eligibility depends on matching the precise product description.