Declassification Guidance 006-97
In coordination with N2, the Office for Plans, Programs, and Budget, the decision has been made to declassify all cryptologic financial and resource information as well as all information pertaining to manpower levels through 1975. However, funding totals or summaries which reveal DoD National Foreign Intelligence Program totals, and any budget or manpower information from 1976 to the present remains classified.
N5P6, 11 July 1997