Final answer:
An Export License is required for politically sensitive goods or high-technology goods that may have military uses due to national security implications.
Step-by-step explanation:
For politically sensitive goods, such as nuclear fuels, or high-technology goods that may have military uses, the required documentation is often an Export License. This is because such items may have national security implications and restrictions are thus placed on their export to prevent them from falling into the hands of potential adversaries or being used in a harmful manner. Missile defense systems are a prime example of goods that a country with a comparative advantage would be reluctant to export to a geopolitical rival for national security reasons. Additionally, in certain situations, nations may restrict trade of specific goods that form a key part of their cultural identity, such as rice in Japan.
As the shipping of goods may involve several logistical documents, including a Bill of Lading (which records the receipt of goods for shipment) and a Certificate of Origin (which declares where the goods were manufactured), the Pro Forma Invoice (an initial bill of sale), it is important to note that specifically for sensitive goods the Export License is critical due to the potential use of the goods in question.