TCO 0715533 declares that specified thermal‑oil heaters (tariff heading 8419.50.90) are covered by item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995 from 18 Sep 2007 (made under s.269P of the Customs Act 1901). Importers are affected because the concession changes the tariff treatment; the delegate of the Chief Executive Officer issued it and it may be revoked under ss.269SC–269SD. Using the concession requires correct tariff classification and customs documentation; importers may adjust sourcing or pricing in response.