In an open decklist competition, each round players are provided with their opponent’s decklist to review at the start of the match and in between games of the match. Players may not review decklists during gameplay.
§ 401.5.a Tournament Rules PDF (officieel)
§ 401 Deck Registration
§ 401.5 Other player’s decklists are normally considered private information. The head judge of an event may run that event or the final rounds of that event using an open decklist policy. In this case, all players’ decklists will be considered public information.
