This Tariff Concession Order (TCO 0941082) classifies self‑propelled, submergible fish‑farming‑net cleaners (tariff 8479.89.90) as eligible for item 50, Part III of Schedule 4 to the Customs Tariff Act 1995, effective 30 Oct 2009 (made under s269P; revocable under s269SC/269SD).
Mechanically, it lowers customs duty for importers of the specified machines; the Chief Executive Officer’s delegate decides eligibility and may revoke the concession, while officials must enforce classification and compliance.