Changed halftime intermission from 15 minutes to 12.

The interval from the end of one play until the snap of the next play will be a maximum of 45 seconds, or a maximum 25-second interval after certain administrative stoppages and game delays. (The latter interval had been 30 seconds).

Whenever a player goes out of bounds outside the last two minutes of the first half or the last five minutes of the second half, the game clock is to be started when the ball is spotted at the hashmark and the referee gives his signal, rather than on the snap.

Except in the last two minutes of the first half and the last five minutes of the second half, and unless there is an injury or television utilizes a commericial opportunity, the game clock will be started following a kickoff return when the referee gives the ready signal rather than on the snap.

Except in the last two minutes of the first half and the last five minutes of the second half, the game clock will be started on the referee's ready signal following all declined penalties, rather than on the snap.

Clarified the penalty for a player who butts, spears or rams an opponent to make it clear that, in addition to a loss of 15 yards, the player might be disqualified if the action is judged to be flagrant or vicious.

Stated NFL will start strictly enforcing long-standing uniform code, calling for all players on a team to wear same color shoes, either black or white, all season. Rule does not apply to kickers.

Will permit teams to shoot still photographs during games, so long as they are given to personnel in upstairs boxes only, not on the field.

Changed the spot of penalty enforcement for an illegal pass from location of the ball when it is released to the spot where any part of the passer's body is beyond the line of scrimmage when the ball is released.