Which regulation governs derivative classification?

Executive Order 13526 is the regulation that governs derivative classification. This order establishes the framework for the classification of national security information and provides the guidelines for how information is to be classified, including by derivative classification. Derivative classification refers to the process of incorporating, paraphrasing, restating, or generating new documents based on classified information.

This executive order ensures that individuals tasked with derivative classification understand the standards for determining what information can be classified, including any appropriate markings and the necessity to adhere to existing classification guidelines. It specifically addresses the responsibilities of individuals who engage in derivative classification to ensure that they are properly trained and aware of the classification levels of the source documents they are referencing.

The other options, while they may pertain to the classification of national security information in different contexts, do not specifically govern derivative classification.