509.4. At high OPL, a player can reverse their most recent action and make a different decision for that action (including not taking it at all) if no new action has been taken by either player and the following is true:
509.4. At high OPL, a player can reverse their most recent action and make a different decision for that action (including not taking it at all) if no new action has been taken by either player and the following is true: