What is the umpire interference rule in high school baseball?

Answer 1

There are two types of umpire interference: when the umpire hinders the catcher's attempt to throw the ball and when an umpire is struck by a fair batted ball before it touches or passes an infielder, other than the pitcher. In the case of interference on a catcher's throw; if the throw retires the runner, the play stands, if not, the ball is dead and all runners return to their bases. In the case of interference on an infielder, the batter-runner is awarded first base and all other runners advance only if forced to do so.