2018 USPA Rules
RULE 24- RIGHT OF WAY
i. Right of Way on the Boards: when the ball is hit toward the boards and stops or is within approximately 6” of the boards, a player following the ball that is at an angle of approximately 90 degrees perpendicular to the boards, cannot turn without allowing the trailing player to clear or make a nearside play; unless the trailing player checks or reduces speed, the player with the ball may then turn the ball in either direction providing that he maintains speed and continues the play