- AZ
- CO
- GA
- ID
- MN
- MO
- MS
- NC
- NE
- OK
- RI
- SC
- TN
- UT
- VA
Other states are considering it:
- AR
- HI
- IA
- Il
- MI
- NH
- NV
- PA
- TN
- TX
- WA
- WV
It appears the states are serious about implementing this system. Not only is there a concern about employment in the given states, but the states also see this as an attempt to combat illegal immigration since the federal goverment appears to be unable to control the situation.