This Order (made under s.269P of the Customs Act 1901) declares that a specified type of roof‑mounted bus/coach air conditioner — meeting minimum cooling, heating and evaporator air capacities — is to be treated as a good covered by Item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, effective 17 Aug 2011 until revoked (ss.269SC/269SD). Mechanically, it changes how importers and customs officers classify and apply tariff treatment to those qualifying units; compliance requires showing the unit meets the listed technical criteria.