Goalposts: The goalpost width between uprights is 23ft 4in in college football; in professional football the width between goalposts is 18ft 6in.

The field: for the college game has the same overall dimensions as that for the professional game, but the inbounds lines in college football are only 53ft 4in in from the sidelines, and the goal line is the equivalent of the end line on the professional field. In professional football the inbounds lines are 70ft 9in in from the sidelines.

Ball: The ball used in professional football is all leather; colleges may use a rubber or composition-cover ball if agreed beforehand. The dimensions of the ball specified for use in college football are similar to those specified for use by professional players, except that the short circumference must be 21-21 1/4in compared to 21 1/4—21 1/2in in professional football.

Officials: number5-6 in college football and 7 in professional football. Kick off in professional football players kick off from the 3Oyd line. College players kick from the 40yd line.

If the game ends after 4 periods in a tie score: in college football the result of the game is a tie. In professional football a sudden death overtime period of 15 minutes is provided. Whichever team scores first is the winner.

Spot the ball: Colleges spot the ball for the conversion attempt at the 3yd line. In professional football the ball is spotted on the 2yd line.

Fumbles: The college rule on fumbles is that when a fumble touches the ground, only the team that has fumbled can advance the ball. In professional football a fumble may be picked up and advanced by any player on either team. If the fumble is caught in the air the rules for both college and professional football permit either team to advance the ball.

Holding an opponent: The penalty awarded for holding an opponent is 10yd in college play and 15yd in professional football.

Inbound: ln college football the player must have one foot in bounds at the time of the catch. The rules of professional football require that both feet are inbounds while in possession of the ball.

Player on the ground: A professional running back or receiver, with the ball, may continue to run after he slips to the ground without being tackled. In college football the runner may not advance it any part of his body except his hands and feet touches the ground.

Missed field goals: in professional football result in the ball being returned to the point where the kick was made (line of scrimmage). Colleges return missed field goals to the 20yd line.