Public Law 62.
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/statutes-at-large/vol-64/public-law-62·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
*Cryptographic and communication intelligence.* AN ACT To enhance further the security of the United States by preventing disclosures of information concerning the cryptographic systems and the communication intelligence activities of the United States May 13, 1950 159 514