A laundry list of specific criteria, while certainly beloved of lawyers, would be both too permissive and too limiting. The sample criteria includes such concepts as a nation's honor--which could be stretched to apply to some very dubious situations. At the same time, a specific set of criteria as proposed will never cover all situations. Classic just war theory remains appropriate.
Not really-- we know exactly how these rules will be applied:
a) Every act of self-defense by the US will be labeled aggression and a war-crime;
b) Every excuse will made for every attacker of the US until the US addresses the "root causes" of terrorism by submitting to the "will of the international community".
In terms of their goals, the terrorists are now working hand-in-hand with the Eurocrats and the UN in order to demonstrate that "unilateralism" is a failure by blaming US policy for every terror attack, thererby to force the US to go back to giving the UN and the Eurons a veto over our actions.