ad valorem rate

At the highest point on the scale the Tariff indicates an ad valorem rate of duty only.

The law replaced most ad valorem rates with specific duties assessed on a good-by-good basis.

If the ad valorem rate is less than the minimum then the MIN stated in the Tariff applies.

As a starting point, he accepted the nullifiers' offer of a transition period but extended it from seven and a half years to nine years with a final target of a 20% ad valorem rate.

The Walker Tariff produced the nation's first standardized tariff: rather than setting fixed rates for specific items on a case-by-case basis, it established general schedules into which all goods could be classified, subject to defined ad valorem rates.