What is penalty for violating rule 4.03c in baseball?

Answer 1

Rule 4.03c deals with all players except the pitcher and the catcher being in fair territory before the ball is put into play. There is no penalty for violating this rule, but, an observant umpire will stop play and require the player or players to move to a legal position before putting the ball into play. Should a player or players be in an illegal position when the ball is put into play, the umpire shall call the ensuing play "dead" as if it did not occure.