 The umpires are responsible for monitoring the condition of the ball, and must inspect it regularly.Where an umpire has deemed a player to be guilty of ball tampering (the Laws refer to unfairly changing the condition of the ball), five penalty runs are awarded to the other side, and, if desired by the opposing captain, the ball is immediately replaced.The replacement ball is chosen by the umpires, and should match the condition of the previous ball (before tampering) as closely as possible.