This March 7, 2011 Executive Order?

(b) This order is intended solely to establish, as a discretionary matter, a process to review on a periodic basis the executive branch's continued, discretionary exercise of existing detention authority in individual cases. It does not create any additional or separate source of detention authority, and it does not affect the scope of detention authority under existing law. Detainees at Guantánamo have the constitutional privilege of the writ of habeas corpus, and nothing in this order is intended to affect the jurisdiction of Federal courts to determine the legality of their detention.