31 C.F.R. § 2.16 Downgrading and declassification markings.
Title 31 - Money and Finance: Treasury
Whenever a change is made in the original classification or in the dates of downgrading or declassification of any classified information, it shall be promptly and conspicuously marked to indicate the change, the authority for the action, the date of the action, and the identity of the person taking the action. Earlier classification markings shall be cancelled or otherwise obliterated when practicable. See also §2.7(h).
Title 31: Money and Finance: Treasury
PART 2—NATIONAL SECURITY INFORMATION
Subpart C—Downgrading and Declassification
§ 2.16 Downgrading and declassification markings.
