Definitions of unsettled on the Web: still in doubt; an unsettled issue; an unsettled state of mind. changeable: subject to change; a changeable climate; the weather is uncertain; unsettled weather with rain and hail and sunshine coming one right after the other. wordnet.princeton.edu/perl/webwn.
Credit and criminal history checks will be conducted on all applicants. For a Top Secret security clearance, the background investigation includes additional record checks which can verify citizenship for the applicant and family members, verification of birth, education, employment history, and military history.
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. 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.