valor, valoris, valorem... = value

ad valorem = by value

There are ad valorem taxes in the States:

Ad Valorem Tax


Ad valorem tax - tax based on value of real property (real estate) by states, counties, and cities.

Can also base the ad valorem on the value of an automobile.

(http://www.speculativebubble.com/terms/advt.shtml)

ad valorem





`By value'. An ad valorem tax is a tax (see taxation) on the price of a good or service. The ad valorem principle is used, e.g., in import tariffs and value added tax.

(http://w2.xrefer.com/entry/288261)


See also :
http://www.ratewave.com/AEIOceanServicesInc/012/t0000028.htm
http://www2.state.ga.us/Legis/1997_98/leg/fulltext/hb205.htm


http://www.ad-valorem.fr/advalore.html