Are players obligated to register their decks and sideboards at Competitive and Professional REL?

Players are indeed required to register their decks and sideboards at both Competitive and Professional Rules Enforcement Levels (REL). This requirement is in place to ensure transparency and integrity in tournament play. By registering their decks, players provide tournament officials a way to verify that the decks are legal and that players are indeed adhering to the rules and format they are participating in.

This deck registration also facilitates easier processes for resolving any conflicts that may arise regarding gameplay or card legality during the tournament. Additionally, having registered decks allows for accurate record-keeping and statistics collection for the tournament as a whole, helping to enhance the overall competition experience.

While there are situations in less formal events where registration might not be required, the structured environment of Competitive and Professional REL places a strong emphasis on maintaining clear documentation of what is being played in the tournament. This is crucial for upholding the spirit and fairness of the game.