Mechanically, this Tariff Concession Order applies Schedule 4 item 50 of the Customs Tariff Act 1995 to imports classified at tariff heading 3208.90.00 described as polyurethane‑based primers, effective 19 Aug 2005 until revoked. It affects importers of those primers by altering their customs duty treatment (reducing or removing tariff liability for qualifying imports). The order is made by a delegate of the Chief Executive Officer under s269P (Michael Perry); revocation and compliance obligations sit with the administering authority and importers (ss269SC, 269SD).