With the allowance of players drinking water at the touchline is it permissible for a player to take a breath of oxygen in the same manner under the same stipulations?USSF answer (January 29, 2007):
Oxygen for breathing is available in the air, but water for drinking is not; therefore they are not the same thing. If players cannot breathe properly on the field, then they should not be playing. Oxygen on the sideline would be for emergency use only in the hands of an athletic trainer or medical person. Anyone needing to avail themselves of oxygen in an emergency capacity would be out of that game and need a medical release from a doctor, after a check-up, to be permitted to play. Making the decision to keep the player out of the game is within the authority of the referee.