Home › CFR › Title 15 › Part 4a15 CFR Part 4a — Classification, Declassification, and Public Availability of National Security Information§ 4a.1— General.§ 4a.2— Director for Security.§ 4a.3— Classification levels.§ 4a.4— Classification authority.§ 4a.5— Duration of classification.§ 4a.6— General.§ 4a.7— Mandatory review for declassification.§ 4a.8— Access to classified information by individuals outside the Government.