[El Gato]

I didn't see where Congress used Art 1 Sec 8 Cl 11 as the authority to authorize the president to prosecute war.

Just because they didn't cite it doesn't mean they didn't use it. Congress rarely cites it authority to do what it does. Of course that's often because it doesn't have any. Not true in this case however.

[William Terrell]

For legislation to be legal it has to have an enacting clause. The legislation authorizing the president to war has a form. 1-8-11 autorizes Congress to declare war. The legislation I see doesn't have that form, so it isn't authorized under the only power the constitution gives Congress for that purpose.

It seems to use UN mandates for authorization.