This Tariff Concession Order (TCO) applies item 50 of Part III of Schedule 4 of the Customs Tariff Act 1995 to imports classified at tariff heading 8536.50.99 (non DIN‑rail mounted Residual Current Devices), effective 5 February 2009. Mechanically, it changes the customs treatment of those imported goods by making them subject to the Schedule 4 concession listed in Column 2. It remains in force until revoked under sections 269SC or 269SD and therefore directly affects importers and customs officers.