Home › CFR › Title 32 › Part 15632 CFR Part 156 — Department of Defense Personnel Security Program (PSP)§ 156.1— Purpose.§ 156.2— Applicability.§ 156.3— Policy.§ 156.4— Responsibilities.§ 156.5— National security positions.§ 156.6— Common access card (CAC) investigation and adjudication.§ 156.7— Definitions.