28 CFR § 17.22 - Classification of information; limitations.
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(d) Information shall not be classified in order to conceal inefficiency, violations of law, or administrative error; to prevent embarrassment to a person, organization, or agency; to restrain competition; or to prevent or delay release of information that does not require protection in the interest of national security. Information that has been declassified and released to the public under proper authority may not be reclassified.
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https://www.law.cornell.edu/cfr/text/28/17.22