Regional economic integration is a type of trade liberalization treaty in the sense that the member states participating in the agreement decide to abolish tariffs and restrictive regulations that may hamper or discourage trade between each other. Tariffs and restrictions on trade with nations outside the agreement are retained. The idea is that the member states will be able to strengthen each other's economies through mutual support. Businessmen in the member countries will be motivated to trade and invest within the region because of the lack of tariffs or regulations.