How to Classify Documents
Updated 11/13/03

Information is classified in one of two ways, Originally or Derivatively.

1. Original Classification is a first time decision that new or previously unclassified information requires protection against unauthorized disclosure. Only individuals specifically authorized in writing (normally DAS and above) may classify documents originally.

2. Derivative Classification is the act of incorporating, restating or generating in new form information that is already classified, and marking the new material with the same markings as the classified source documents. Any individual with a secret or top secret security clearance, who is required by the work to restate classified source information, may classify derivatively.

3. The purpose of marking classified material is:

To alert the holder that the information requires protection and the degree of protection required.
To advise how long it requires protection and facilitate downgrading and declassification actions.

4. The following required markings are placed on all classified documents at the time of classification:

Overall classification (Top and bottom on the first page, each interior page, and on the outside of the back page.)
Portion marking (Each section, part, paragraph, subparagraph or similar portion with the classification level initial, e.g. (S) for "Secret").
A "Classified by" line (Original classification "name and title" or Derivative classification "source document").
Reason for classification. The classifier shall include, at a minimum, a brief reference to the classification category or categories, or the number 1.5, plus the letters that correspond to that classification category in section 1.5 of Executive Order 12958.
A "Declassify on" line (a specific date or event, not to exceed 10 years from the date of original classification). If the classifier determines the information requires protection beyond 10 years, the "Declassify on" line shall include declassification instructions listed in section 3.4 of Executive Order 12958.

For additional information contact: Security Staff at 202-482-8355.