This Tariff Concession Order makes parts for tracklaying machines (classification 8431.49.90) subject to item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, so those imports receive the Schedule 4 concession. It started on 13 July 2011 and continues until revoked. The Order was issued by a delegate under s.269P of the Customs Act 1901 (Paul Mercer) and may be revoked under ss.269SC–269SD. Importers of these parts are the primary beneficiaries; administrative classification and revocation risk remains with the customs authority and importers.