Washington Headquarters Services Administrative Instruction AI 27: Control of North Atlantic Treaty Organization (NATO) Classified Documents, March 10, 2011 [Incorporating Change 1, April 13, 2017] [open pdf - 75KB]
From the Purpose and Applicability section: "This Administrative Instruction (AI): a. Reissues Reference (a) in accordance with the authority in Reference (b). b. Implements the policy of Reference (c) and assigns responsibilities and outlines procedures for the handling and control of North Atlantic Treaty Organization (NATO) classified material. This AI: a. Applies to the OSD [Office of the Secretary of Defense] and activities for which the Washington Headquarters Services (WHS) provides administrative support (hereafter called 'OSD Components'). b. Does not apply to the Office of the Chairman of the Joint Chiefs of Staff and the Joint Staff, the U.S. Representative to the NATO Military Committee, or the Military Departments."
Washington Headquarters Services Administrative Instruction AI 27; WHSAI AI 27
Defense Technical Information Center: http://www.dtic.mil/