National Security Information Handbook

NSI Handbook
Identification and Marking
Reason: 1.4 (e)
Declassify On: Completion of Operation
2. On October 10, 2002, the OCA has determined that a scientific experiment relating to
an EPA operation in the lab needs to be classified for seven years. The OCA will
mark this decision on all applicable classified research documents as follows:
Classified By: (OCA name), Administrator, EPA
Reason: 1.4 (e)
Declassify On: October 10, 2009
3. When a specific date or event is not identified, the OCA shall apply the date that is 10
years from the date of the original decision. For example, on a document that
contains information classified on October 10, 2002, mark the "Declassify On" line as
follows:
Classified By: (OCA name), Administrator, EPA
Reason: 1.4(e)
Declassify On: October 10, 2012
4. If the OCA determines that the information requires protection beyond the original
date, the "Declassify On" line shall be revised to include the new declassification
instructions, the identity of the OCA authorizing the extension, and the date of the
action. This date cannot exceed 25 years from the date of the original document or
classification decision. An example of an extended duration of classification is as
follows:
Classified By: (OCA name), Administrator, EPA
Reason: 1.4 (e)
Declassify On: October 10, 2009 (Classification extended on October 10, 2009
until December 1, 2015, by (OCA name), Administrator, and
EPA
Section 4: Derivative Classification Markings
4-400 Required Derivative Classification Markings
1. Information classified derivatively on the basis of source documents or classification
guides shall bear all markings prescribed in Section 4-201. Source document
markings shall be carried forward or taken from appropriate classification guides.
2. At the time of derivative classification, the following information shall appear on the
face of each classified document (this information is also referred to as the
classification block):
4-3