The National Defense Authorization Act for FY2012 and Beyond: Detainee Matters. Jennifer K. Elsea, Legislative Attorney; Michael John Garcia  Legislative Attorney. January 27, 2014.

“In recent years, Congress has included provisions in annual defense authorization bills addressing issues related to detainees at the U.S. Naval Station at Guantanamo Bay, Cuba, and, more broadly, the disposition of persons captured in the course of hostilities against Al Qaeda and associated forces. The National Defense Authorization Act for FY2012 (2012 NDAA; P.L. 112-81) arguably constituted the most significant legislation informing wartime detention policy since the 2001 Authorization for the Use of Military Force (AUMF; P.L. 107-40), which serves as the primary  legal authority for U.S. operations against Al Qaeda and associated forces. Much of the debate surrounding passage of the 2012 NDAA centered on what appeared to be an effort to confirm or, as some observers view it, expand the detention authority that Congress implicitly granted the President via the AUMF in the aftermath of the terrorist attacks of September 11, 2001. But the 2012 NDAA addressed other issues as well, including the continued detention of persons at Guantanamo. Both the 2013 NDAA (P.L. 112-239) and the 2014 NDAA (P.L. 113-66) also contain subtitles addressing U.S. detention policy, particularly with respect to persons held at Guantanamo, though neither act addresses detention matters as comprehensively as did the 2012 NDAA. The 2012 NDAA authorizes the detention of certain categories of persons and requires the military detention of a subset of them (subject to waiver by the President); regulates status determinations for persons held pursuant to the AUMF; regulates periodic review proceedings concerning the continued detention of Guantanamo detainees; and continued funding restrictions that relate to Guantanamo detainee transfers to foreign countries. During floor debate, significant attention centered on the extent to which the bill and existing law permit the military detention of U.S. citizens believed to be enemy belligerents, especially if arrested within the United States. The enacted version of the bill included a provision to clarify that the bill’s affirmation of detention authority under the AUMF is not intended to affect any existing authorities relating to the detention of U.S. citizens or lawful resident aliens, or any other persons captured or arrested in the United States. When signing the 2012 NDAA into law, President Obama stated that he  would “not authorize the indefinite military detention without trial of American citizens.”