States can opt out — refuse to make changes to their driver's licenses that will be required under the federal law — but then the licenses would be useless for any federal purpose, from getting benefits to boarding an airplane guarded by federal screeners.Much like forcing seat belts and HOV lanes on state law makers by tying it to federal highway funding... and knowing that state law makers never met a dollar bill they didn't like, it will probably be passed without much question.
Yahoo! News - Driver's Licenses Spark Privacy Debate
