Which regulation specifies the implementation of the marking of classified information?

The regulation that specifies the implementation of the marking of classified information is found in 32 CFR Part 2001. This part of the Code of Federal Regulations establishes the policies and guidelines for the classification and declassification of national security information, including the specific procedures for marking such information. Proper marking is critical to ensure that classified information is handled appropriately and to inform individuals about the classification level and handling requirements of the information.

While other options mention various relevant laws and orders related to classified information, 32 CFR Part 2001 specifically addresses the details regarding the marking process itself, which is essential for maintaining the integrity and security of classified material.