MrktMkr1986
Who, ultimately, is responsible for enforcing UN Security Council resolutions?
The UN. However, each individual country that signed on to the cease fire agreement following Gulf War I and all the terms therein (and every UN resolution following) has a separate individual agreement with Iraq. Any one of the countries that the Iraqis made that agreement with can justifiably take action against the offending party INDIVIDUALLY
Is a preemptive attack legal under international law?
Treaty enforcement is.
Let's reduce this to a simple scenario.
There's a schoolyard bully who is taking everyone's lunch money. We'll call him Saddam. One day saddam picks on Kewait (one of the kids at the school) and decides to beat him up. Joe (US) gets ticked and jumps in to defend Kewait. Similarly Pippin (UK) and others chip in with the occational kick to the stomach as Saddam is betting pummeled. Kewait staggers off to class.
Saddam yells "Stop, I'll do anything just tell me what I have to do!".
Joe, Pippin, Dingo-Man, and now Francois and Hanz who have walked over to the scene and are ticked at Saddam too decide that they should set the terms for which they'll leave Saddam alone and let him go back to whatever it is he does when he's not taking money.
The group decides that Saddam has to open his pockets every day before school and during lunch so that they can make sure that he hasn't taken anyone's money. Saddam agrees.
The next day at lunch time Saddam refused to open his pockets for inspection by the group. Joe looks at Pippin, Dingo, Francois, Hanz and others and says "what are we going to do?". Francois says "nothing, I'm fine with it. He gave me some extra money today anyway." Hanz says "You know what, I don't care. I'm outta here. I hate you guys." Dingo says "Whatever Mate. I'm up for a fight, and then we'll put some shrimp on the barbee." Pippin says something non-committal.
Joe (and the others) let Saddam go as long as he promises to open his pockets tomorrow. But tomorrow comes and he doesn't... and the group doesn't want to do anything. Meanwhile people seem to be getting beaten up, and missing money. Saddam continues to refuse to open his pockets at lunch.
Finally Joe gets sick of it. Joe, Dingo, and Pippin go against the wishes of the group (to do nothing) and beat the crap out of Saddam. They then kick him out of school, so that he can never return (students can do that in this school).
Now I ask you, did Joe, have a right to get invovled when Hanz and Francois were not willing to jump in? Just because Hanz and Francois didn't want to enforce their part in the agreement, does that mean that Joe couldn't enforce his?
Saddam made an agreement with everyone in the group, that he would open his pockets. If one or two, or even the majority of the members don't want to enforce the terms - that doesn't mean that the rest of them can't take it upon themselves to enforce those terms.
Also, it doesn't matter if Saddam's pockets are empty after he has been kicked out of school. He refused to submit to inspection - the terms set with every member of the group. By refusing to live up to his end (submit to inspection) he allowed the group memebers to refuse to live up to their end (leave him alone).