The U.S. Supreme Court on Monday takes up a free speech case on whether Texas was wrong in rejecting a specialty vehicle license plate displaying the Confederate flag, which is to some an emblem of Southern pride and to others a symbol of racism.

The nine justices will hear a one-hour oral argument in a case that raises the issue of how states can allow or reject politically divisive messages on license plates without violating free speech rights. States can generate revenue by allowing outside groups to propose specialty license plates that people then pay a fee to put on their vehicle.

The group Sons of Confederate Veterans says its aim is to preserve the "history and legacy" of soldiers who fought for the pro-slavery Confederacy in the U.S. Civil War. Its proposed design featured a Confederate battle flag surrounded by the words "Sons of Confederate Veterans 1896." The flag is a blue cross inlaid with white stars over a red background.