For the first game of a match, start of game procedures may be performed as soon as both players reach their assigned seat, even before the start of the round clock. Gameplay must wait for the round clock to begin.
§ 406.1.f Tournament Rules PDF (officieel)
§ 406 Start of Game Procedure
§ 406.1 The setup process for a game of Riftbound is defined in the Core Rules. See CR 110. Setup Process. Additionally: