If a player disagrees with a judge’s ruling, he or she may appeal the ruling to the Head Judge.
The right to appeal is one of the protections granted to players. It allows them to get a second opinion if they disagree on the Floor Judge’s ruling, or just think the penalty is too harsh.
In larger, Premier-level tournaments (such as Grand Prix and Pro Tours), with prior approval, the Head Judge may designate additional Appeals Judges who are also empowered to hear appeals. They will be wearing the same uniform as the Head Judge.
Players may not appeal before the full ruling is made by the responding Floor Judge. Rulings made by the Head Judge or designated Appeals Judges are final.
Players are required to be respectful to judges, which includes letting them finish their ruling before disagreeing with them. Players appealing a judge based on perception of the Judge or how they think the judge is going to rule undermines that judge’s authority, and can be considered Unsporting Conduct — Minor.