The Designated Approving Authority, in the United States Department of Defense, is the official with the authority to formally assume responsibility for operating a system at an acceptable level of risk.
[1] This position is defined by the Department of Defense Directive 8500.1 (Information Assurance) - E2.1.13.
Designated Approving Authority (DAA).
The Command-in-Chief of the unified command (CENTCOM or SOCOM) would be the DAA, giving him/her the ability to override NSA recommendations.
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