NCAA 2-28 Fair Territory
SECTION 28. That part of the playing field within and including the first- and third-base lines from home plate to the bottom of the playing-field fence and perpendicularly upwards. Both foul lines are in fair territory.
Note: A ball shall be judged fair or foul according to the relative position of the ball and the foul line, including the foul pole, and not as to whether the fielder is on fair or foul territory at the time the ball is touched.