A federal appeals court panel grilled New York officials in their bid to unfreeze $73.5 million federal highway funds the Trump administration is withholding over allegedly not complying with the Department of Transportation’s crackdown on commercial driver’s licenses for noncitizens.

A three-judge panel on the U.S. Court of Appeals for the 2nd Circuit heard arguments in New York’s effort to rescind the DOT’s April notice of final determination of substantial noncompliance, which failed to comply with the department’s revised standards for noncitizen CDLs and allegedly refused to correct deficiencies. One of the main disputes is over whether federal law requires the expiration date of the noncitizen CDLs to match up with the end of the noncitizen’s work authorization, something New York officials argue federal law does not say.