Department of Defense Instruction 5210.91: Polygraph and Credibility Assessment (PCA) Procedures [open pdf - 239KB]
This Department of Defense [DoD] Instruction: "Incorporates and cancels DoD 5210.48-R (Reference (a)), the Under Secretary of Defense for Intelligence (USD(I)) Memorandum (Reference (b)), and the Deputy Under Secretary of Defense (Counterintelligence and Security) Memorandum (Reference (c)). [It also] Establishes and implements policy, assigns responsibilities, and provides procedures governing the use of polygraph and other approved credibility assessment tools in accordance with the guidance in DoD Directive (DoDD) 5210.48 (Reference (d)) and the authority in DoDD 5143.01 (Reference (e))."
DoD Instruction 5210.91; DoDI 5210.91
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/