Players are responsible for ensuring that their cards and/or card sleeves are not marked during the tournament. A card or sleeve is considered marked if it bears something that makes it possible to identify the card without seeing its face, including(but not limited to) scratches, discoloration, and bends.
If a player’s cards are sleeved, the cards must be examined while in the sleeves to determine if they are marked. Players should use care when sleeving their decks and should randomize their decks prior to sleeving them to reduce the possibility of cards becoming marked with a pattern. Players should also keep in mind that cards or sleeves may become worn and potentially marked through play during the course of a tournament.
The Head Judge has the authority to determine if a card in a player’s deck is marked. Judges may request that a player remove his or her current sleeves or replace any of the deck’s current sleeves immediately, or before the next round.