This Tariff Concession Order (TCO 0701465) declares a narrowly described class of "hydration systems" (specified capacity, bladder-mouth size, key/wallet pocket, shoulder straps) to be goods to which Part III, Schedule 4, item 50 of the Customs Tariff Act 1995 applies, effective 24 January 2007 until revoked. It affects importers and manufacturers by changing the tariff treatment that applies to these products; the decision was made by a delegate of the Chief Executive Officer and requires compliance with the product measurements and features listed.