What determines whether information from a source document can be included in a new document as secret?

The determination of whether information from a source document can be included in a new document as secret is primarily guided by what is contained in the information from the source. This refers to the specifics of the data, including its classification level, significance, and the reasons for its original classification. For derivative classification, it is essential to accurately reflect the original classification markings and the reasons they were applied to ensure the new document appropriately conveys the classified status of the information.

Incorporating information that is explicitly designated as secret or classified ensures that any new documents created do not inadvertently misuse or misrepresent sensitive data. It is crucial to understand the source's classification to maintain the integrity of national security and protect sensitive information adequately. Thus, focusing on the essence of the information derived from the source document is key to adhering to proper classification practices.