From the Document: "The Johnson Memorandum states that 'to prevent unwarranted intrusions into the privacy of individuals[,] . . . use of the polygraph is prohibited' in the Executive Branch, subject to three 'limited exceptions.' [...] Based on our examination of the historical record, we conclude that while President Johnson apparently signed the Memorandum in January 1967, he did not issue it as a directive to the Executive Branch, nor was the document understood contemporaneously to have legal effect. Even assuming the Memorandum did take effect at the time of signature, uncontroverted evidence demonstrates that President Johnson gave subsequent directions to his subordinates sufficient to revoke the Memorandum and deny it further legal effect. It is our view, therefore, that the Memorandum does not now bind the Department of Justice or other entities within the Executive Branch."