Which element is NOT included in the markings of classified information?

Markings of classified information are designed to convey essential information about the nature of the classification and its handling requirements. The source of classification indicates who or what authorized the classification level, helping personnel understand where the classification originates. Downgrading instructions provide essential guidance on when the information can be declassified or downgraded, ensuring that individuals know how to handle the information appropriately over time. Warnings and notices are included to alert individuals of the potential consequences or legal implications of unauthorized disclosure.

In contrast, file sharing permissions are not typically a part of the classification markings. While sharing policies are vitally important for managing classified information, they are not included in the actual classification markings. Therefore, the element absent from the markings of classified information is the specifics of file sharing permissions.