The following 12 countries are members of the Economic Community of West African States (ECOWAS) and use a common basis (Common External Tariff - CET) for their customs tariffs:

The module Customs Tariffs contains the Common External Tariff (TEC) of the ECOWAS as well as the customs tariffs of Benin, Côte d'Ivoire, Ghana, Guinea, Liberia, Nigeria, Senegal and Togo including the national particularities.