{"data":{"id":"us/18-cfr-3a.91","jurisdiction":"us","citation":"18 CFR 3a.91","heading":"a.91 Data index system.","body":"A data index system shall be established for Top Secret, Secret, and Confidential information in selected categories prescribed by the Interagency Classification Review Committee, in accordance with section VII of the National Security Council Directive Governing the Classification, Downgrading, Declassification, and Safeguarding of National Security Information, May 17, 1972.","path":["Title 18—Conservation of Power and Water Resources","CHAPTER I—FEDERAL ENERGY REGULATORY COMMISSION, DEPARTMENT OF ENERGY","SUBCHAPTER A—GENERAL RULES","PART 3a—NATIONAL SECURITY INFORMATION"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-18.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:34Z","sha256":"f69c6198d98120f89b655377ac459fe913cb87017ec00cc457b4522f5677b3b1","source_id":"us-cfr","stale":true,"prev":"us/18-cfr-3a.81","next":"us/18-cfr-3b.1"},"notice":"GroundRules: Original legal text. Not legal advice."}