American Football NCAA Rule 6-1-1

For any free kick formation, the kicking team’s restraining line shall be the yard line through the most forward point from which the ball shall be kicked, and the receiving team’s restraining line shall be the yard line 10 yards beyond that point. Unless relocated by a penalty, the kicking team’s restraining line on a kickoff shall be its 35-yard line, and for a free kick after a safety, its 20-yard line.