+Relyea, Harold C., Specialist in American National Government, Government and Finance Division, Congressional Research Service (CRS), National Emergency Powers (PDF — 84K)
Disasters & the Law
UC Berkeley School of Law
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"With the exception of the habeas corpus clause, the Constitution makes no allowance for the suspension of any of its provisions during a national emergency. Disputes over the constitutionality or legality of the exercise of emergency powers are judicially reviewable. Indeed, both the judiciary and Congress, as co-equal branches, can restrain the executive regarding emergency powers. So can public opinion. Furthermore, since 1976, the President has been subject to certain procedural formalities in utilizing some statutorily delegated emergency authority. The National Emergencies Act (50 U.S.C. 1601-1651) eliminated or modified some statutory grants of emergency authority, required the President to declare formally the existence of a national emergency and to specify what statutory authority, activated by the declaration, would be used, and provided Congress a means to countermand the President's declaration and the activated authority being sought. The development of this regulatory statute and subsequent declarations of national emergency are reviewed in this report, which is updated as events require."—Summary.