Official Rules(view all)

NCAA 3-6k

Umpire jurisdiction in regard to personal confrontations and unsportsmanlike conduct directed toward them begins when the umpires enter the game site and ends when the umpires have left the game site.

[OBR 4.03e: As soon as the home team’s batting order is handed to the umpire-in-chief the umpires are in charge of the playing field.]