I found those two "explanations" of the lawful contact and resonable suspision that people seem to be confused about.. and that the officers have to be compliant with the federal immigration laws that already exist..
No, lawful contact does not mean just because you're talking to a cop he can ask you to prove your a legal resident. Profiling is illegal. Period.
There is so much hyperbole and histrionics surrounding this bill and false information it's not even funny any more.
Since profiling is illegal, lawful contact requires an activity. There is going to have to be some type of activity that will lead to a reasonable suspicion the person is in the country illegally. If that activity leads to the reasonable suspicion, the police officer has the means to determine whether you are a legal resident.