What can happen to license exceptions?

License exceptions can indeed be revoked without notice, which is a crucial aspect of export controls and compliance. This means that even if a license exception has been granted for a particular transaction or commodity, the governing authorities can withdraw that exception at any time if circumstances change or if there are concerns regarding compliance with export regulations. This flexibility is important for ensuring that national security and foreign policy objectives are met, as situations in international relations can evolve rapidly.

In contrast, it is not accurate to say that license exceptions are guaranteed for all exports, only apply to military exports, or are permanent once granted. Each of these statements misrepresents the nature of license exceptions and their oversight. License exceptions are specifically defined under export regulations and can vary widely in their scope and applicability.