This Tariff Concession Order declares that a specific ‘layer cage battery system’ (feeders, egg collectors, drinking systems, manure removal systems) classified at tariff code 8436.29.00 is eligible for concessional treatment under Schedule 4 item 50 from 1 November 2007 until revoked. It affects importers and buyers of these systems by enabling lower or exempted tariff treatment; the customs delegate decides and may revoke the concession, creating an administrative compliance step for importers who claim it.