Rules: 7.08(a)(1)
A runner is out if they move more than three feet outside their base path to avoid a tag.
Runners may leave the base path to avoid interfering with a fielder fielding a batted ball.
A runner may not run backward toward home plate to avoid a tag (similar to NCAA).
Younger Levels Consideration: Umpires may give more leniency if a younger player inadvertently steps out of the base path without intent to avoid a tag.