Restrict the importing country is a measure of the number of imported goods.

Quantity of imported goods importing country to develop a quantitative restriction, for Where the imported goods within a certain limit can be applied to lower tax rates or tax exemptions, but after over quota tariff quotas for the imported goods is higher or generally applicable tax rates. Strictly speaking, quotas and taxes on imported goods because of its volume is not as clearly defined, so not a part of the quota. But because of high import tariffs on imported goods are produced virtually limiting effect. Tariff quota is to benefit the domestic unit or group of countries to be allocated between Member States ceiling. The use of quotas as indicated by all the beneficiary countries, called the global tariff quota; such use is limited to a single individual beneficiary countries, called single beneficiary tariff quotas.