FOIA Exemption Findings

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A Vaughn Index is directly tied to FOIA exemptions — it is the mechanism agencies use to justify why specific documents fall under one or more of the nine FOIA exemptions. For each withheld document or redaction, the agency must identify the exemption(s) claimed and explain why the record qualifies.

The nine FOIA exemptions

1. Exemption 1 — Classified Information. Documents properly classified for national defense or foreign policy, under an Executive Order. Common in military, intelligence, and diplomatic records.
2. Exemption 2 — Internal Personnel Rules. Internal agency practices and procedures; administrative matters of little public interest. Cannot be used to hide substantive agency actions.
3. Exemption 3 — Information Exempt Under Other Statutes. Documents specifically protected by other federal laws (e.g., tax records under the IRC, CIA operational files, census data). The other statute must explicitly require non-disclosure.
4. Exemption 4 — Trade Secrets / Commercial Information. Confidential business information — trade secrets, financial data, commercial proposals. Often invoked for contractor bids and proprietary formulas.
5. Exemption 5 — Deliberative Process Privilege. Inter- and intra-agency memos and letters protecting pre-decisional deliberations and policy discussions. The most frequently litigated exemption; also covers attorney-client privilege and attorney work product.
6. Exemption 6 — Personal Privacy. Personnel, medical, and similar files whose disclosure would be a "clearly unwarranted invasion of personal privacy." Requires balancing the privacy interest against the public interest.
7. Exemption 7 — Law Enforcement Records. Applies only to records compiled for law enforcement purposes. Six subparts:
   • 7(A) — ongoing investigations
   • 7(B) — fair trial rights
   • 7(C) — personal privacy
   • 7(D) — confidential sources
   • 7(E) — law enforcement techniques
   • 7(F) — physical safety
8. Exemption 8 — Financial Institution Information. Reports from agencies regulating financial institutions; protects bank examination reports and audit materials.
9. Exemption 9 — Geological / Geophysical Information. Oil and gas well data. Rarely used.

How the Vaughn Index works with exemptions

For each withheld document, the Vaughn Index must:

1. Identify which exemption(s) apply.
2. Explain why that specific document fits the exemption criteria.
3. Justify why no portions can be segregated and released.
4. Demonstrate that the agency applied the exemption narrowly.

For example, to claim Exemption 5 (deliberative process), the index must show the document is pre-decisional (created before a final decision), deliberative (contains opinions, not just facts), and that release would harm the agency's decision-making process.

Courts use the Vaughn Index to determine whether an agency properly applied exemptions without conducting in camera (private) review of every document — making it a crucial tool in FOIA litigation.