CFR > Title 32 - National Defense > SUBTITLE A—Department of Defense > CHAPTER I—OFFICE OF THE SECRETARY OF DEFENSE (parts 1 to 399) > SUBCHAPTER D—PERSONNEL, MILITARY AND CIVILIAN (Parts 44–149) > PART 147—ADJUDICATIVE GUIDELINES FOR DETERMINING ELIGIBILITY FOR ACCESS TO CLASSIFIED INFORMATION > SUBPART B—Investigative Standards (§147.18 to §147.24) > 147.21—Expanding investigations.