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(d) Information classified in accordance with Section 1.3 shall not be declassified automatically as a result of any unofficial publication or inadvertent or unauthorized disclosure in the United States or abroad of identical or similar information.

Sec. 1.4 Duration of Classification.

(a) Information shall be classified as long as required by national security considerations. When it can be determined, a specific date or event for declassification shall be set by the original classification authority at the time the information is originally classified.

(b) Automatic declassification determinations under predecessor orders shall remain valid unless the classification is extended by an authorized official of the originating agency. These extensions may be by individual documents or categories of information. The agency shall be responsible for notifying holders of the information of such extensions.

(c) Information classified under predecessor orders and marked for declassification review shall remain classified until reviewed for declassification under the provisions of this Order.

Sec. 1.5 Identification and Markings.

(a) At the time of original classification, the following information shall be shown on the face of all classified documents, or clearly associated with other forms of

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