(Reuters) - A U.S. appeals court on Wednesday agreed to revisit a challenge to an Arizona voting law which restricted the ability of advocates to collect absentee ballots by hand.  A three judge 9th U.S. Circuit Court of Appeals had earlier upheld the Arizona law, but the full court on Wednesday voted to rehear the case before an 11-judge panel. Five conservative 9th Circuit judges dissented from the decision to rehear the case, saying it was made too close to Election Day. 