<P> In Canadian amateur football, the ball is not dead if a player kneels momentarily to, and does, recover a rolling snap, onside / lateral pass, or opponent's kick, while in American amateur football, such a situation produces a dead ball, unless the player is the holder for a place kick . The holder is allowed to catch the snap or recover a rolling snap while on a knee to hold the kick and may also rise to catch a high snap and immediately return to a knee . </P> <P> At professional levels in both games, unless it is a clearly willful kneel or slide by a ball carrier to go down, a player must be touched while on the ground, otherwise, the player may stand up and continue to advance the ball . Hitting a player who is kneeling, sliding, or clearly intends to run the ball out of bounds (especially quarterbacks) is generally viewed as unsportsmanlike and is often penalized, and in the most blatant of cases (especially if it happens in the dying seconds of a game), the player may be subject to off - field disciplinary action by their respective league governing body, usually in the form of fines or suspensions . </P> <P> The procedures to settle games that are tied at the end of regulation vary considerably among football leagues . </P> <P> Most leagues other than the NFL, including the CFL, use a procedure frequently called the "Kansas Playoff", so named because it was first developed for high school football in that state . The rules are summarized here: </P>

What are the differences between the nfl and cfl