NFL rule changes and points of emphasis

• When the quarterback is in the pocket with the ball, defenders can't initiate contact with receivers more than 5 yards from the line of scrimmage. A receiver pushing off in the same situation also will be called for a penalty.

• Hands to the face is completely outlawed.

• Blockers can't roll up on the side of a defender's legs, in addition to backs of the legs.

• The clock keeps running after sacks in the final two minutes of halves.

• Pre-snap movements by offensive linemen will be more strictly enforced.

• Taunting and/or abusive language is an automatic 15-yard penalty.

• Touchdown celebrations are limited to spiking the ball. Dunking on a goal post is a penalty.

• Referees can confer with the NFL officiating department during replays.

• Uprights are extended from 30 to 35 feet.

• A loose ball on the field of play, not just the end zone, is reviewable.