In this post, I want to excerpt the key passages from the majority opinion in Boumediene v. Bush. Boumediene is a remarkably long opinion — 70 pages, probably Justice Kennedy's longest majority opinion ever. Here are the key sections:

   First, in Justice Kennedy's majority opinion, the Court concludes that the detainees have a Constitutional right to habeas relief at Gitmo. Here's the holding stated in the majority opinion:

Petitioners present a question not resolved by our earlier cases relating to the detention of aliens at Guantanamo: whether they have the constitutional privilege of habeas corpus, a privilege not to be withdrawn except in conformance with the Suspension Clause, Art. I, §9, cl. 2. We hold these petitioners do have the habeas corpus privilege. Congress has enacted a statute, the Detainee Treatment Act of 2005 (DTA), 119 Stat. 2739, that provides certain procedures for review of the detainees’ status. We hold that those procedures are not an adequate and effective substitute for habeas corpus. Therefore §7 of the Military Commissions Act of 2006 (MCA), 28 U. S. C. A. §2241(e) (Supp. 2007), operates as an unconstitutional suspension of the writ. We do not address whether the President has authority to detain these petitioners nor do we hold that the writ must issue. These and other questions regarding the legality of the detention are to be resolved in the first instance by the District Court.

The Court then goes on to talk a lot about the history of habeas, and then distinguishes Eisentrager very much along the lines of Justice Kennedy's concurrence in Rasul v. Bush. The Court then concludes that the detainees have a constitutional right to habeas:

It is true that before today the Court has never held that noncitizens detained by our Government in territory over which another country maintains de jure sovereignty have any rights under our Constitution. But the cases before us lack any precise historical parallel. They involve individuals detained by executive order for the duration of a conflict that, if measured from September 11, 2001, to the present, is already among the longest wars in American history. See Oxford Companion to American Military History 849 (1999). The detainees, moreover, are held in a territory that, while technically not part of the United States, is under the complete and total control of our Government. Under these circumstances the lack of a precedent on point is no barrier to our holding.

We hold that Art. I, §9, cl. 2, of the Constitution has full effect at Guantanamo Bay. If the privilege of habeas corpus is to be denied to the detainees now before us, Congress must act in accordance with the requirements of the Suspension Clause. . . . The MCA does not purport to be a formal suspension of the writ; and the Government, in its submissions to us, has not argued that it is. Petitioners, therefore, are entitled to the privilege of habeas corpus to challenge the legality of their detention.

The Court then looks to whether the alternative to traditional habeas is adequate and effective, which the Court interprets as asking if the alternative is similar to traditional habeas. The Court concludes that the law Congress passed, the Detainee Treatment Act (DTA), is not adequate and effective alternative to traditional habeas:

Congress intended the Court of Appeals to have a more limited role in enemy combatant status determinations than a district court has in habeas corpus proceedings. The DTA should be interpreted to accord some latitude to the Court of Appeals to fashion procedures necessary to make its review function a meaningful one, but, if congressional intent is to be respected, the procedures adopted cannot be as extensive or as protective of the rights of the detainees as they would be in a [habeas] proceeding. Otherwise there would have been no, or very little, purpose for enacting the DTA.

The Court then details ways in which the DTA is insufficiently protective, and concludes that the problems with the DTA are too major to allow minor tinkering:

[E]ven if it were possible, as a textual matter, to read into the statute each of the necessary procedures we have identified, we could not overlook the cumulative effect of our doing so. To hold that the detainees at Guantanamo may, under the DTA, challenge the President’s legal authority to detain them, contest the CSRT’s findings of fact, supplement the record on review with exculpatory evidence, and request an order of release would come close to reinstating the §2241 habeas corpus process Congress sought to deny them. The language of the statute, read in light of Congress’ reasons for enacting it, cannot bear this interpretation. Petitioners have met their burden of establishing that the DTA review process is, on its face, an inadequate substitute for habeas corpus.

Although we do not hold that an adequate substitute must duplicate §2241 in all respects, it suffices that the Government has not established that the detainees’ access to the statutory review provisions at issue is an adequate substitute for the writ of habeas corpus. MCA §7 thus effects an unconstitutional suspension of the writ.

Finally, near the end of the decision, the Court gets to the timing of habeas review. Can a court step in with a habeas proceeding immediately, or do they have to wait for CSRT hearings? Here's what Justice Kennedy concludes:

In cases involving foreign citizens detained abroad by the Executive, it likely would be both an impractical and unprecedented extension of judicial power to assume that habeas corpus would be available at the moment the prisoner is taken into custody. If and when habeas corpus jurisdiction applies, as it does in these cases, then proper deference can be accorded to reasonable procedures for screening and initial detention under lawful and proper conditions of confinement and treatment for a reasonable period of time. Domestic exigencies, furthermore, might also impose such onerous burdens on the Government that here, too, the Judicial Branch would be required to devise sensible rules for staying habeas corpus proceedings until the Government can comply with its requirements in a responsible way.

Our holding . . . should not be read to imply that a habeas court should intervene the moment an enemy combatant steps foot in a territory where the writ runs. The Executive is entitled to a reasonable period of time to determine a detainee’s status before a court entertains that detainee’s habeas corpus petition. The CSRT process is the mechanism Congress and the President set up to deal with these issues. Except in cases of undue delay, federal courts should refrain from entertaining an enemy combatant’s habeas corpus petition at least until after the Department, acting via the CSRT, has had a chance to review his status.

However, the Gitmo detainees have been held for up to 6 years, and they deserve a prompt hearing:

While some delay in fashioning new procedures is unavoidable, the costs of delay can no longer be borne by those who are held in custody. The detainees in these cases are entitled to a prompt habeas corpus hearing.

Justice Kennedy's opinion concludes with a message to the Bush Administration:

Officials charged with daily operational responsibility for our security may consider a judicial discourse on the history of the Habeas Corpus Act of 1679 and like matters to be far removed from the Nation’s present, urgent concerns. Established legal doctrine, however, must be consulted for its teaching. Remote in time it may be; irrelevant to the present it is not. Security depends upon a sophisticated intelligence apparatus and the ability of our Armed Forces to act and to interdict. There are further considerations, however. Security subsists, too, in fidelity to freedom’s first principles. Chief among these are freedom from arbitrary and unlawful restraint and the personal liberty that is secured by adherence to the separation of powers. It is from these principles that the judicial authority to consider petitions for habeas corpus relief derives.

Our opinion does not undermine the Executive’s powers as Commander in Chief. On the contrary, the exercise of those powers is vindicated, not eroded, when confirmed by the Judicial Branch. Within the Constitution’s separation-of-powers structure, few exercises of judicial power are as legitimate or as necessary as the responsibility to hear challenges to the authority of the Executive to imprison a person. . . The laws and Constitution are designed to survive, and remain in force, in extraordinary times. Liberty and security can be reconciled; and in our system they are reconciled within the framework of the law. The Framers decided that habeas corpus, a right of first importance, must be a part of that framework, a part of that law.