Dixie Youth Softball

Dixie Sweetees - 6u & Dixie Darlings - 8U

"If a base runner leaves her base before the ball is hit by the batter, the base umpire shall drop a signal flag to indicate the violation at the time it occurs. The defensive team shall have the privilege of having nullified any portion of the play that occurred on the violation."

Dixie Angels - 10U & Dixie Ponytails - 12U

"If a base runner leaves her base before (DIXIE ANGELS ONLY) the ball is hit by the batter, and (DIXIE PONYTAILS ONLY) the pitch reaches the batter, the base umpire shall drop a signal flag to indicate the violation at the time it occurs. The defensive team shall have the privilege of having nullified any portion of the play that occurred on the violation."

DYS is what my local rec league goes by and we use the flags although they don't have to be red and they don't have to be flags. Dropping something noticeable is the important thing.

Skahtboi is correct that it is a delayed dead ball and most of us use the DDB signal also.