[Chukinrox]

Rule 8 - Section 4 - Article 1:
The batter-runner is out when:
g. he runs outside the 3 foot running lane (last half of the distance from home plate to first base), while the ball is being fielded or thrown to first base;

now if there was a runner on first, is this an immediate/delayed dead ball or is it live? Also, does the runner have to return to first or not?