This Tariff Concession Order (TCO 0513456) declares that non‑contacting seals — (a) dry running gas seals and (b) gas‑lubricated dual seals — classified at 8484.20.00 are goods to which Part III, Schedule 4 item 50 of the Customs Tariff Act 1995 applies, effective 4 Oct 2005 until revoked. Mechanically, it changes the customs concession/status that applies on import. It affects importers and brokers by changing tariff concession eligibility; the CEO’s delegate issued it and may revoke under sections 269SC/269SD of the Customs Act 1901. Importers must classify correctly and monitor for revocation.