A specific rate duty is a tariff levied on imports, defined in terms of a specific amount per unit, such as cents per kilogram. By contrast, an ad valorem duty is a charge levied on imports defined in terms of a fixed percentage of value.
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This article incorporates public domain material from Jasper Womach. Report for Congress: Agriculture: A Glossary of Terms, Programs, and Laws, 2005 Edition (PDF). Congressional Research Service.
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