Prohibitions: The President Executive Order 13526 Classified National Security Information Memorandum

This is a law that refers to exactly what I've been talking about--using classification to conceal crime or any of the following reasons below...

Sec. 1.7. Classification Prohibitions and Limitations. (a) In no case shall
information be classified, continue to be maintained as classified, or fail
to be declassified in order to:

(1) conceal violations of law, inefficiency, or administrative error;
(2) prevent embarrassment to a person, organization, or agency;
(3) restrain competition; or
(4) prevent or delay the release of information that does not require protection in the interest of the national security.
(b) Basic scientific research information not clearly related to the national security shall not be classified.
(c) Information may not be reclassified after declassification and release to the public under proper authority unless:

(1) the reclassification is personally approved in writing by the agency head based on a document-by-document determination by the agency that reclassification is required to prevent significant and demonstrable damage to the national security;
(2) the information may be reasonably recovered without bringing undue attention to the information;
(3) the reclassification action is reported promptly to the Assistant to the President for National Security Affairs (National Security Advisor) and the Director of the Information Security Oversight Office; and
(4) for documents in the physical and legal custody of the National Archives and Records Administration (National Archives) that have been available for public use, the agency head has, after making the determinations required by this paragraph, notified the Archivist of the United States (Archivist), who shall suspend public access pending approval of the reclassification action by the Director of the Information Security Oversight Office. Any such decision by the Director may be appealed by the agency head to the President through the National Security Advisor. Public access shall remain suspended pending a prompt decision on the appeal.
(d) Information that has not previously been disclosed to the public under proper authority may be classified or reclassified after an agency has received a request for it under the Freedom of Information Act (5 U.S.C. 552), the Presidential Records Act, 44 U.S.C. 2204(c)(1), the Privacy Act of 1974 (5 U.S.C. 552a), or the mandatory review provisions of section 3.5 of this order only if such classification meets the requirements of this order and is accomplished on a document-by-document basis with the personal participation or under the direction of the agency head, the deputy agency head, or the senior agency official designated under section 5.4 of this order. The requirements in this paragraph also apply to those situations in which information has been declassified in accordance with a specific date or event determined by an original classification authority in accordance with section 1.5 of this order.
(e) Compilations of items of information that are individually unclassified may be classified if the compiled information reveals an additional association or relationship that:

(1) meets the standards for classification under this order; and
(2) is not otherwise revealed in the individual items of information.

Sec. 1.8. Classification Challenges.