American Football NCAA Rule 3-2-1-c

c. Game management will determine the timing of halftime activities. The field will be available to squad members no later than three minutes prior to the second half kickoff. When any Squad Member enters the playing enclosure during the halftime intermission, a staff member from that team must be present on the field. If kickers or other squad members come onto the playing enclosure before the field is available, their activities must be confined to the team area. All team personnel will be respectful of scheduled halftime activities, and all kicks must be into the practice kicking nets until the field is available.