31 C.F.R. § 2.33 Responsibilities of holders [4.1(b)].
Title 31 - Money and Finance: Treasury
Any person having access to and possession of classified information is responsible for protecting it from persons not authorized access, i.e., persons who do not possess an appropriate security clearance, and who do not possess the required need-to-know. This includes keeping classified documents under constant observation and turned face-down or covered when not in use and securing such information in approved security equipment or facilities whenever it is not under the direct supervision of authorized persons. In all instances, such protective means must meet accountability requirements prescribed by the Department.
Title 31: Money and Finance: Treasury
PART 2—NATIONAL SECURITY INFORMATION
Subpart D—Safeguarding
§ 2.33 Responsibilities of holders [4.1(b)].
