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Short answer
A Department of Defense (DoD) distribution statement is a standardized administrative marking assigned to technical documents under DoD Instruction (DoDI) 5230.24. It explicitly defines the secondary dissemination limitations of the information, specifying which organizations are authorized access (such as U.S. government agencies, defense contractors, or the public) and identifying the controlling DoD office responsible for approving further release.
Definition and scope
In defense research and engineering, technical documents—including scientific reports, engineering specifications, software documentation, test plans, and contract deliverables—often contain information critical to military capabilities. Even when unclassified, such data may present significant national security risks if released without restriction. To manage this risk systematically, the Department of Defense maintains DoDI 5230.24, “Distribution Statements on DoD Technical Information.”
A distribution statement specifies the extent to which a document may be distributed beyond its initial recipient. Every DoD technical document must be marked with a valid distribution statement before dissemination, archival, or submission to the Defense Technical Information Center (DTIC). Crucially, the assignment of a distribution statement does not reflect security classification (Confidential, Secret, or Top Secret); rather, it governs dissemination control. Distribution statements apply to both unclassified technical information and classified technical documents.
The authority to assign, modify, or remove a distribution statement rests exclusively with the designated “controlling DoD office”—the military service branch, defense agency program manager, or laboratory directorate that sponsored or funded the work. Secondary recipients, including university research personnel and defense contractors, cannot alter or downgrade a statement without written approval from the controlling office.
Breakdown of Distribution Statements A through F
DoDI 5230.24 defines six primary distribution statements, designated alphabetically from A to F. Statements B through F represent restricted dissemination tiers that require explicit administrative justifications, determination dates, and controlling office contact details:
| Statement | Authorized Audience | Standard Text Requirement | Typical Research and Operational Use |
|---|---|---|---|
| Statement A | Public release | “Approved for public release: distribution is unlimited.” | Unclassified scientific papers, fundamental research results, public symposium presentations, and open technical reports cleared by security review. |
| Statement B | U.S. Government agencies only | “Distribution authorized to U.S. Government agencies only [fill-in reason] [date of determination]. Other requests for this document must be referred to [controlling DoD office].” | Preliminary technical evaluations, proprietary government evaluations, or interagency assessments where commercial defense contractors are excluded from access. |
| Statement C | U.S. Government agencies and their contractors | “Distribution authorized to U.S. Government agencies and their contractors [fill-in reason] [date of determination]. Other requests for this document must be referred to [controlling DoD office].” | Technical data, software tools, and design specifications shared with active federal contractors supporting defense and interagency programs. |
| Statement D | Department of Defense and U.S. DoD contractors only | “Distribution authorized to the Department of Defense and U.S. DoD contractors only [fill-in reason] [date of determination]. Other requests for this document must be referred to [controlling DoD office].” | Critical military technologies, tactical weapons research, operational engineering specifications, and advanced sensor designs restricted strictly to defense enterprises. |
| Statement E | DoD Components only | “Distribution authorized to DoD Components only [fill-in reason] [date of determination]. Other requests for this document must be referred to [controlling DoD office].” | Internal military evaluations, draft operational requirements, weapon system vulnerabilities, and direct military service deliverables excluding contractors. |
| Statement F | Direct authorization only | “Further distribution only as directed by [controlling DoD office] [date of determination] or higher DoD authority.” | Highly sensitive technical disclosures, proprietary breakthrough technologies, or critical operational analyses requiring individual release authorization for every recipient. |
Earlier editions of defense acquisition standards utilized Distribution Statement X for export-controlled technical data. However, Statement X was formally eliminated from DoDI 5230.24. Documents previously eligible for Statement X are now marked using Distribution Statement C or Distribution Statement D, citing “Export Controlled” as the underlying restriction reason.
Mandatory reason categories for Statements B through F
Whenever a restrictive statement (B, C, D, E, or F) is applied, DoDI 5230.24 requires the controlling office to specify one or more authorized reason categories within the bracketed text. Recognized categories include:
- Controlled Technical Information (CTI): Technical information with military or space application that is subject to access, use, or disclosure controls under defense regulations.
- Export Controlled: Data subject to export restrictions under the Arms Export Control Act, International Traffic in Arms Regulations, or Export Administration Regulations.
- Critical Technology: Technologies identified on the Militarily Critical Technologies List that possess significant military utility.
- Proprietary Information: Technical data detailing trade secrets, commercial manufacturing processes, or patent-pending discoveries submitted by private entities.
- Vulnerability Information: Assessments of vulnerabilities in critical defense systems, physical infrastructure, or computer networks.
- Foreign Government Information: Information provided by foreign governments with the understanding that it will be held in confidence.
- Test and Evaluation: Premature disclosure of incomplete test data or experimental weapon system performance.
Intersection with CUI and Controlled Technical Information
Following the establishment of the federal Controlled Unclassified Information program under Executive Order 13556 and 32 CFR Part 2002, the Department of Defense updated its information security architecture through DoDI 5200.48, “Controlled Unclassified Information (CUI).” This update established a direct connection between CUI categories and DoDI 5230.24 distribution statements.
In defense research, technical data marked as CUI frequently falls into the category of Controlled Technical Information (CTI). Under DoDI 5200.48, whenever technical documents contain CTI, they must carry both standard federal CUI markings and a DoDI 5230.24 distribution statement. Research staff should reference CASRAI’s guides to understand Controlled Unclassified Information (CUI) definitions, compare the handling rules in CUI Basic vs. CUI Specified, and review formatting standards in CUI cover sheets and marking.
Because CUI represents unclassified information requiring safeguarding and dissemination controls, a document designated as CUI can never carry Distribution Statement A. By definition, Distribution Statement A authorizes unrestricted public release, which directly contradicts the legal safeguarding requirements of CUI. Consequently, any document bearing CUI banner markings must carry Distribution Statement B, C, D, E, or F.
University and laboratory compliance considerations
For academic research institutions, university-affiliated research centers, and non-profit laboratories, distribution statements introduce critical contractual and operational compliance obligations:
- Fundamental research vs. contract restrictions: Under National Security Decision Directive 189 (NSDD-189), basic and applied scientific research conducted at universities is normally treated as fundamental research and exempt from dissemination restrictions. However, when a DoD contract or subaward incorporates clauses requiring pre-publication review or assigning a restrictive distribution statement (Statements B through F), the fundamental research exclusion is eliminated for that project.
- Export control compliance: Restrictive distribution statements frequently cite “Export Controlled” as the operating reason. Research involving such deliverables is subject to strict regulatory oversight under International Traffic in Arms Regulations. Administrators must review CASRAI’s analysis of ITAR compliance requirements for research institutions to ensure adequate technology control plans and physical access restrictions are in place.
- Military medicine and sponsored trials: Biomedical and clinical researchers collaborating on defense health initiatives—such as projects coordinated through the Henry M. Jackson Foundation for the Advancement of Military Medicine—must carefully monitor distribution markings on technical deliverables, operational protocols, and medical test data.
- Subrecipient monitoring: Prime contractors and university lead institutions are responsible for flowing down distribution statement requirements to subcontractors, consultants, and external testing laboratories. Subrecipients must maintain compliant digital repositories and physical safeguards matching the assigned statement.
Secondary distribution, referrals, and public release clearance
When an organization receives a document bearing Distribution Statements B, C, D, E, or F, it cannot disseminate the material beyond the authorized audience identified in the statement. If a third party requests access, the recipient must refer the requester directly to the controlling DoD office identified on the document cover.
If researchers believe a restricted technical document should be made available to a broader audience or published in an open journal, they must formally request public release clearance. The controlling office coordinates a formal security and policy review. If approved, the controlling office issues a formal notification authorizing the document to be updated to Distribution Statement A.
Frequently asked questions
What does DoD Distribution Statement A mean?
Distribution Statement A means the technical document has undergone official security and policy review and has been approved for unlimited public release. It can be shared freely with the general public, media, foreign nationals, and posted on public websites without restriction.
Can a document containing CUI have Distribution Statement A?
No. Controlled Unclassified Information (CUI) requires safeguarding and dissemination controls by law and regulation. Because Distribution Statement A authorizes unrestricted public distribution, it is fundamentally incompatible with CUI. CUI technical documents must be assigned Distribution Statement B, C, D, E, or F.
What happened to Distribution Statement X?
Distribution Statement X was formally eliminated from DoD Instruction 5230.24. It was previously used for export-controlled technical data. Documents that would have previously qualified for Statement X are now assigned Distribution Statement C or Distribution Statement D with “Export Controlled” designated as the reason.
Who determines which distribution statement is assigned to a document?
The assignment of a distribution statement is determined solely by the controlling DoD office—the sponsoring military department, program office, or defense agency laboratory that funded the research. Contractors and academic researchers cannot assign or alter a statement without controlling office direction.
Sources
- Department of Defense Instruction (DoDI) 5230.24. Distribution Statements on DoD Technical Information. Washington Headquarters Services (WHS). https://www.esd.whs.mil/ (Read 2026-11-07).
- Department of Defense Instruction (DoDI) 5200.48. Controlled Unclassified Information (CUI). Office of the Under Secretary of Defense for Intelligence and Security. https://www.esd.whs.mil/ (Read 2026-11-07).
- Defense Technical Information Center (DTIC). DTIC Submission Guidelines: Distribution Statements and Markings. https://www.dtic.mil/ (Read 2026-11-07).
- National Archives and Records Administration (NARA). 32 CFR Part 2002 — Controlled Unclassified Information. Information Security Oversight Office (ISOO). https://www.ecfr.gov/ (Read 2026-11-07).
