Non-tariff barriers to trade (NTBs) or sometimes called "Non-Tariff Measures (NTMs)" are trade barriers that restrict imports, but are unlike the usual form of a tariff; And Tariff Barriers restricts Exports. Some common examples of NTB's are anti-dumping measures and countervailing duties, which, although called non-tariff barriers, have the effect of tariffs once they are enacted. Example of Tariff Barrier is Export Duty.