WASHINGTON (AP) — The Supreme Court will decide whether it was proper for a single federal judge to throw out a lawsuit challenging Maryland’s 2011 congressional redistricting plan.

The justices on Monday agreed to hear an appeal from a group of Maryland residents who say their First Amendment challenge should have been reviewed by a three-judge panel.

READ MORE: Maryland Prepares For Increase In Patients After Roe V. Wade Overturned

Federal law requires a special panel of three judges to hear constitutional redistricting cases unless a single judge who initially considers the case decides it is frivolous or “obviously without merit.”

READ MORE: Johns Hopkins Experts Describe Updated Gun Control Laws As 'Great First Step'

After the residents filed their lawsuit, a district court judge decided it didn’t belong before a full panel because it was based on theories the court had previously rejected.

The Maryland residents say any ruling that considers the merits must be heard by three judges.

MORE NEWS: Baltimore's Mayor Scott Frees Up $300K In Funding For Pro-Abortion Organizations To Assist Women

(Copyright 2015 by The Associated Press. All Rights Reserved.)