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N MI 7900 4 Need help?
Status: CANCELLED
Subject: NASA AIRCRAFT OPERATIONS MANAGEMENT - DELEGATION OF AUTHORITY
Responsible Office Code: JL
Effective Date: December 10, 1993
Expiration Date: December 10, 1997
Cancellation Date: February 25, 1999 
Document Cancelling this Directive (if Cancelled): N PD 7900 4A
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Documents Cancelled by this Directive: