They didn't, and thus, according to the 10th Amendment, it's up to the State ... which is basically what they said in their ruling, as long as it is "Narrowly defined in the law". While you may "verbally" identify yourself, they also have ruled that an officer may detain you to check things out. Thus, if you want to be detained from as reasonably needed to check you out (which could be hours or days, depending on how much of a dick you want to be), that is up to you.
BTW, I am no longer going to be posting on this thread. Not because I'm losing or sick of discussing it (I'm not), I'm just sick of seventh circle and going to add him BACK to my IL and thus, this thread will "vanish" for me. Feel free to make another if you wish to continue.