This order declares that a narrowly defined class of pressurised cabins for hazardous conditions — fitted with air conditioners, flood lamps, junction boxes, winch‑control terminals and grounding cables — qualify for the tariff concession listed at item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995. It affects importers of those cabins by changing their customs duty treatment from 12 October 2007 until the order is revoked, and creates classification and compliance obligations for importers and customs officers.