Resource: Chamber of Commerce of the United States v. Whiting

Various business and civil-rights organizations challenged the enforceability of The Legal Arizona Worker's Act ("LAWA") in an Arizona federal district court. They argued that federal law preempted LAWA, which requires Arizona employers to use the federal E-Verify employment verification system and revokes business licenses of those who hire unauthorized workers. The district court upheld the statute. On appeal the U.S. Court of Appeals for the Ninth Circuit affirmed, holding that LAWA was not preempted explicitly or impliedly by the federal Immigration Reform and Control Act ("IRCA"). The court reasoned that IRCA although IRCA expressly preempts all state and local laws imposing sanctions for hiring or recruiting unauthorized aliens, it excepts licensing laws – like LAWA – from preemptive reach. The court also reasoned that mandating the use of E-Verify is not impliedly preempted by IRCA because Congress could have, but did not, expressly forbid states from requiring E-Verify participation.