non-tariff barrier

Non-tariff barriers to trade are trade barriers that restrict imports but are not in the usual form of a tariff.They are criticized as a means to evade free trade rules such as those of the World Trade Organization (WTO), the European Union (EU), or North American Free Trade Agreement (NAFTA) that restrict tariffs. Some of the common examples are anti-dumping measures and countervailing duties, which, although they are called "non-tariff" barriers, have the effect of tariffs but are only imposed under certain conditions. Their use has risen sharply after the WTO rules led to a very significant reduction in tariff use.
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