Member States benefit from trade agreements, including by creating more employment opportunities, reducing unemployment rates and experimenting with the market. Since trade agreements are usually accompanied by investment guarantees, investors wishing to invest in developing countries are protected from political risks. Regional trade agreements have the following advantages: full integration of Member States is the last level of trade agreements. Regional trade agreements vary according to the level of commitment and agreement between Member States. Customs unions are agreements between countries for which the parties agree to allow free trade in products within the customs union and agree on a common external law (TEC) on imports from the rest of the world. It is this TEC that distinguishes a customs union from a regional trade agreement. . . .