A more thorough explanation:

An export license is a permit required by the government to export certain items outside of the country. The purpose of this license is to ensure that sensitive technology and goods that could pose a threat to national security are not exported without proper authorization.

In the United States, only items that fall under certain categories require an export license. These categories are listed in the Export Administration Regulations (EAR) and other export laws. The majority of exported items do not require a license at all.

For example, if a company wants to export a piece of military equipment to another country, they would need to obtain an export license from the government. This license would ensure that the equipment is not being used for malicious purposes and is not falling into the wrong hands.

Another example would be if a scientist wanted to export a new technology they had developed to a foreign country. They would need to check the Commerce Control List (CCL) to determine whether an export license is needed. If the technology falls under a category that requires a license, they would need to apply for one before exporting the technology.

Overall, export licenses are an important tool for governments to monitor and control the export of sensitive technology and goods. They help to ensure that national security interests are protected and that these items are not being used for malicious purposes.