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The archivists listen to and review the tapes according to the Federal Regulations

The following terms are used in the Tape Subject Logs to identify the reason for the withdrawal.

  • Federal or Agency Statute
  • Investigatory
  • National Security
  • Non-Historical
  • Privacy
  • Personal Returnable
  • Unintelligible

Restriction Codes  [See Also:  How the Taped Conversations are Reviewed]

The Presidential Recordings and Materials Preservation Act of 1974 (PRMPA) regulations define eight restriction categories.

Release of the information would:

A   –   violate a Federal statute or agency policy

B   –   reveal National security classified information

C   –   pending or approved claim that release would violate an individual's rights

D   –   constitute a clearly unwarranted invasion of privacy or a libel of a living person

E   –   disclose trade secrets or confidential commercial or financial information

F   –   disclose investigatory information compiled for law enforcement purposes

G   –   disclose private and personal material*

H   –   disclose non-historical material

U   –   Unintelligible (In some cases, the Nixon Staff withheld certain portions that were so unintelligible that the staff could not adequately review them for release at this time. These portions are noted on the tape subject log as "[Unintelligible].")

Withdrawal Indicators

  • For all of the withdrawals, the Tape Subject Log will note the relevant restriction category and the duration of the withdrawal

  • For national security withdrawals, the Tape Subject Log will also indicate the main topic or topics of the withdrawal

  • All withdrawals, including unintelligible withdrawals, are represented on the tapes by a ten-second tone


*   Portions of conversations determined to fall within the personal or political returnable restriction category were removed from the tapes and are no longer retained by the National Archives and Records Administration (NARA), in accordance with Presidential Recordings and Materials Preservation Act of 1974 (PRMPA).

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