Department of Defense Personnel Security Program

A personnel security investigation
consisting of both record reviews and interviews with sources of information as
prescribed in paragraph AP1.1.1.3., Appendix 1, this Regulation, covering the most
recent 5 years of an individual's life or since the 18th birthday, whichever is shorter,
provided that at least the last 2 years are covered and that no investigation will be
conducted prior to an individual's 16th birthday.