History

Priority

must

Mar 2019

Removed

Security control 0273 was merged with security control 0270.

Feb 2019

All emails have a protective marking that accurately reflects its contents, including any attachments.

2015

All official emails must have a protective marking.

2010

All official emails must have a protective marking.

2008

Agencies must ensure that protective markings are applied to all emails containing classified information written or forwarded by agency staff members.