Code of Federal Regulations Title 6. Domestic Security § 6.7.25 Identification and markings

(a) Classified information, in all forms, must be marked in a manner that is immediately apparent pursuant to the standards set forth in section 1.6 of Executive Order 13526;  32 CFR part 2001, subpart B;  and internal DHS guidance approved and distributed by the Office of the Chief Security Officer.

(b) Foreign government information shall retain its original classification markings or be assigned a U.S. classification that provides a degree of protection at least equivalent to that required by the entity that furnished the information.

(c) Information assigned a level of classification under predecessor Executive Orders shall remain classified at that level of classification, except as otherwise provided herein, i.e., the information is reclassified or declassified.