National Security Decision Directive 197: Reporting Hostile Contacts and Security Awareness [open pdf - 121KB]
Alternate Title: NSDD 197: Reporting Hostile Contacts and Security Awareness
National Security Decision Directive 197 makes provisions for measures to "enhance overall government efforts to protect against illegal or unauthorized acquisition by hostile intelligence services of information and technology vital to our national interest."
National Security Decision Directive 197; NSDD 197
Digital National Security Archive: http://nsarchive.chadwyck.com/