Answer:
First one: direct agreement
Second one: international organizations
Third one: special economic zone
Explanation:
A direct agreement is an agreement signed by two countries in order to reach mutual beneffits when doing trade between their countries and to lower taxes on imports and exports that would benefit both of them, international organizations are third parties institutions that help countries solve disputes, like the American courts, or the OTAN. A special economic zone is a specific territory that is governed under different economic laws and restrictions like the duty free at the airports.
