This regime is followed by countries and regions that allow trademarked goods that have been exhausted to be resold only in the national or (in the case of the European Union) regional area from which the goods originate. It does not allow such goods to be sold outside that area.
International Trademark Association
http://www.inta.org/TrademarkBasics/FactSheets/Pages/ParallelImportsFactSheet.aspx
See also international exhaustion, parallel import, gray market