Department of Defense
MANUAL
NUMBER 5105.21, Volume 3
October 19, 2012
Incorporating Change 2, Effective September 14, 2020
USD(I&S)
SUBJECT: Sensitive Compartmented Information (SCI) Administrative Security Manual:
Administration of Personnel Security, Industrial Security, and Special Activities
References: See Enclosure 1
1. PURPOSE
a. Manual. This Manual is composed of several volumes, each serving a specific purpose,
and reissues DoD Manual 5105.21-M-1 (Reference (a)). The purpose of the overall Manual, in
accordance with the authority in DoD Directive (DoDD) 5143.01 (Reference (b)), is to
implement policy established in DoD Instruction (DoDI) 5200.01 (Reference (c)), and Director
of Central Intelligence (DCI) Directive (DCID) 6/1 (Reference (d)) for the execution and
administration of the DoD Sensitive Compartmented Information (SCI) program. It assigns
responsibilities and prescribes procedures for the implementation of DCI and Director of
National Intelligence (DNI) policies for SCI.
b. Volume. This Volume:
(1) Addresses the administration of personnel security for DoD personnel considered for
and granted access to SCI.
(2) Provides administrative guidance and procedures for the administration of industrial
security, SCI access for the Executive, Legislative and Judicial branches, security incidents, and
the security education, training, and awareness program within the DoD.
2. APPLICABILITY. This Volume:
a. Applies to:
(1) OSD, the Military Departments, the Office of the Chairman of the Joint Chiefs of
Staff and the Joint Staff, the Combatant Commands, the Office of the Inspector General of the
DoD, the Defense Agencies except as noted in paragraph 2.b., the DoD Field Activities, and all
