Look back rule

[roadking]

NCAA
12.21.6.5 The batter-runner, after overrunning first base, must immediately
return nonstop to first base or, if she does not retouch first base, must
make an attempt to advance to second. If after passing the base, the base
runner is heading back toward first base within the basepath extended, she
may make a decision to go to either base. However, stepping beyond the
extended basepath in foul territory commits the base runner to first base
while stepping beyond the basepath toward the second-base side commits
the base runner to second base.