Who is responsible for marking declassification instructions when a document is first created?

When a national security document is first created, the responsibility for marking declassification instructions rests with the person who classifies it. The framework for this comes from the executive order governing classified national security information, which is overseen by the Information Security Oversight Office (ISOO) at the National Archives.

The Original Classification Authority

The official who first decides that information requires protection is acting as an original classification authority (OCA). An OCA is a government official specifically delegated, in writing, the power to classify information. At the moment of original classification, that authority is responsible for determining and recording the declassification instructions, including how long the information should remain classified.

In practice, the OCA does this by establishing the basis for classification and setting a duration. Declassification is typically tied to:

• A specific date or event when protection is no longer needed
• A standard maximum timeframe set by the governing executive order, when a precise date or event cannot be determined
• An exemption from automatic declassification, where the order allows it

The OCA’s determinations are captured in agency classification guides, which then inform later marking.

Who Actually Marks the Document

While the OCA sets the rules, the person creating a given document often applies the markings through derivative classification. A derivative classifier carries forward the declassification instructions already established by an OCA or found in an authorized classification guide or source document. This person does not invent new instructions; they faithfully restate the guidance that already exists.

Every properly marked record therefore shows:

• The classification level
• The identity of the classifier or the source guidance
• A reason for classification
• A declassification date or event

Why It Matters for Records Professionals

Accurate declassification marking at creation is what makes later review, automatic declassification, and public access possible. Missing or incorrect instructions create downstream problems for archivists, FOIA staff, and the public who eventually request access. Records and information governance teams support this by ensuring classified records are captured, retained, and tracked so the declassification clock can run as intended.

For broader context on related practices, see the declassification topic hub.