Mechanically, this Tariff Concession Order (TCO 0801913) declares that specified parts of stairway chairlifts — carriages, chairs and tracks as defined in Australian Standard AS1735.7‑1998 — are goods to which the tariff treatment in Part III, Schedule 4, item 50 of the Customs Tariff Act 1995 applies (made under s269P of the Customs Act 1901). It takes effect from 1 February 2008 until revoked under ss269SC/269SD. It therefore changes which Schedule 4 tariff treatment applies at import for these parts, affecting importers, customs officers and suppliers.