A federal appeals court has extended its order allowing Kansas and Arizona residents to continue registering to vote using a federal form without having to show proof of citizenship.

The 10th Circuit Court of Appeals issued its order late Monday and granted an expedited hearing on the merits sought by the U.S. Election Assistance Commission and voting rights groups.

Earlier this month, the appeals court issued its emergency stay of U.S. District Judge Eric Melgren's ruling ordering the commission to modify its federal voter registration form to add special instructions for Arizona and Kansas residents about those states' proof-of-citizenship requirements.

Kansas has said if the law is stayed it would implement a system like Arizona's in which voters who registered with the federal form can vote only in federal races.