American Football NCAA Rule 1-4-9

The head coach or their designated representative shall certify in writing to the umpire before the game that all players:
a. Have been informed what equipment is mandatory by rule and what constitutes illegal equipment.
b. Have been provided the equipment mandated by rule.
c. Have been instructed to wear and how to wear mandatory equipment during the game.
d. Have been instructed to notify the coaching staff when equipment becomes illegal through play during the game.