Source: Total Football: The Official Encyclopedia of the National Football League (ISBN0-06-270174-6). pp 1583–1592.
The definition of a drop kick, field goal, and punt is modified: all three can only be attempted from behind the line of scrimmage.
If a foul by a player causes an injury to an opponent, a team time out will not be charged to the penalized team anytime during the game instead of only during the last two minutes of a half.
The game clock will not start until the next snap following any change of possession, even if the player went out of bounds.
Officials will immediately blow the play dead when a defensive player is offsides before the snap and clearly rushes beyond the offensive line in such a way that he becomes an unabated threat to the quarterback.
A touchback will be ruled when a player fumbles the ball in the field of play and it goes out of bounds in the opponent’s end zone.
A touchback, not a safety, will also be ruled when a player fumbles the ball in his own end zone and the opponent is the one that knocks the fumble out of bounds in the end zone.
An offensive player cannot deliberately bat a backward pass forward.