"Section 2(c) states the policy that the powers of the President as Commander in Chief to introduce U.S. armed forces into situations of hostilities or imminent hostilities "are exercised only pursuant to --
(1) a declaration of war,
(2) specific statutory authorization, or
(3) a national emergency created by attack upon the United States, its territories or possessions, or its armed forces."
Now maybe you, Mal, can tell us which one of these applied in the case of Libya?
And, a separate restriction should be noted:
Consultation Requirement
Section 3 of the War Powers Resolution requires the President "in every possible instance" to consult with Congress before introducing U.S. Armed Forces into situations of hostilities and imminent hostilities, and to continue consultations as long as the armed forces remain in such situations. The House report elaborated:
A considerable amount of attention was given to the definition of consultation. Rejected was the notion that consultation should be synonymous with merely being informed. Rather, consultation in this provision means that a decision is pending on a problem and that Members of Congress are being asked by the President for their advice and opinions and, in appropriate circumstances, their approval of action contemplated. Furthermore, for consultation to be meaningful, the President himself must participate and all information relevant to the situation must be made available.