NISPOM download
The current National Industrial Security Program Operating Manual (DoD
5220.22-M) was issued in February 2006 and updated with major changes on March
28 2013. It's important to bear in mind that the 25 Industrial Security Letters
(ISLs) issued by the Defense Security Service between 2006 and May 2014 were not
incorporated into the revised NISPOM. The Defense Security Service issues ISLs
occasionally for "information and clarification of existing policy and requirements."
Companies and organizations with a facility security clearance are required to comply
with guidance that the Defense Security Service puts forth in ISLs in addition to that in
the revised NISPOM. Thus, rather than relying on only the NISPOM for guidance, we
recommend downloading the NISPOM combined with all the Industrial Security