This Tariff Concession Order (TC 0721876) declares that imported diamond saw blades (Customs Tariff classification 6804.21.00 — sintered, hot‑pressed or laser‑welded) are subject to item 50 in Part III of Schedule 4 to the Customs Tariff Act 1995, effective 21 December 2007 until revoked under ss 269SC/269SD. Mechanically, it changes the tariff treatment for affected importers (per s.269P), altering import costs and incentives versus local supply and requiring correct tariff classification and administrative compliance by importers.