A National Agency Check (NAC) is the minimum investigative requirement for final clearance up to SECRET and for interim clearance up to TOP SECRET for certain categories of personnel. An NAC is also an integral part of a background investigation. A prior NAC or investigative equivalent meets this requirement, so long as it was completed within the 12-month period immediately preceding the initiation of the background investigation. The Office of Personnel Management (OPM) also conducts NAC’s with written inquiries (NACI’s) which consist of checks of national agencies plus written inquiries to appropriate law enforcement offices, former employers and supervisors, references, and schools.
As a minimum, three agencies are included in each complete NAC; however, an NAC may also include a check of any or all of a number of other agencies. Defense Central Index of Investigations (DCII) records consist of an alphabetical index of personal names and impersonal titles that appear as subJects, co-subJects, or cross-referenced incidental subjects, in investigative documents held by the criminal, counterintelligence, fraud, and personnel security investigative activities of the three military departments, the National Security Agency, the Defense Criminal Investigative Service, and DIS. The DCII is checked on all SUBJECTS of DIS investigations.
Federal Bureau of Investigation Headquarters (FBI HQ) files contain security, applicant, and criminal investigations conducted by the FBI. A Federal Bureau of Investigation Identification Division (FBI ID) check is a technical fingerprint search, which consists of a classification of the SUBJECT’s fingerprints and comparison with fingerprint cards submitted by law enforcement agencies concerning persons arrested, charged, or convicted of criminal activity. If the fingerprint card is not classifiable, a “name check only” of these files is automatically conducted.
An Expanded National Agency Check (ENAC) consists of investigative inquiries (record reviews and/or interviews), as necessary, to determine if investigative issues are present or to substantiate or disprove unfavorable information disclosed during the conduct of an NAC.
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