This Tariff Concession Order declares a specific yarn (HS 5510.90.00: single‑ply, ring‑spun, waxed, micro modal ≤80% and micro nylon ≥20%, ≤15 tex) to be covered by Part III, Schedule 4 item 50 of the Customs Tariff Act 1995 from 30 Sep 2005 until revoked (ss 269SC/269SD). It affects importers of that yarn by altering its tariff treatment on import; the declaration was made by a delegate under s 269P of the Customs Act 1901, so eligibility depends on correct classification and supporting documentation.