#USElectronicsTariffs Electronic Customs Tariff means a systematically structured list of goods, a so-called nomenclature. This customs tariff nomenclature lists all goods that can be traded internationally as commercial goods, with each good given a specific code number.A tariff is a tax imposed by the government of a country or by a supranational union on imports or exports of goods. Besides being a source of revenue for the government, import duties can also be a form of regulation of foreign trade and policy that taxes foreign products to encourage or safeguard domestic industry.