Ok, from the 2006 Rule Book (I couldn't find my 2007 copy
)
Reviewable Plays. The Replay System will cover the following play situations only:
(a) Plays governed by Sideline, Goal Line, End Zone, and End Line:
1. Scoring Plays, including a runner breaking the plane of the goal line.
2. Pass complete/incomplete/intercepted at sideline, goal line, end zone, and end line.
3. Runner/receiver in or out of bounds.
4. Recovery of loose ball in or out of bounds.
(b) Passing Plays:
1. Pass ruled complete/incomplete/intercepted in the field of play.
2. Touching of a forward pass by an ineligible receiver.
3. Touching of a forward pass by a defensive player.
4. Quarterback (Passer) forward pass or fumble.
5. Illegal forward pass beyond line of scrimmage.
6. Illegal forward pass after change of possession.
7. Forward or backward pass thrown from behind line of scrimmage.
(c) Other Detectable Infractions:
1. Runner ruled not down by defensive contact.
2. Runner ruled down by defensive contact when the recovery of a fumble by an opponent or a teammate occurs during the continuing action of the play.
Note 1: If the ruling of down by contact is changed, the ball belongs to the recovering player at the spot of the recovery of the fumble, and any advance is nullified.
Note 2: Continuing action is any action that occurs through the recovery of the fumble.
Note 3: If the Referee does not have indisputable visual evidence as to which player recovered the fumble, the ruling of down by contact will stand.
Note 4: This does not apply to quarterback pass/fumbles, complete/incomplete passes, or the ruling of forward progress.
3. Forward progress with respect to a first down.
4. Touching of a kick.
5. Number of players on the field.
Note: Non-reviewable plays include but are not limited to:
1. Status of the clock
2. Proper down
3. Penalty administration
4. Runner ruled down by defensive contact (not involving fumbles)
5. Forward progress not relating to first down or goal line
6. Forceouts
7. Recovery of loose ball in the field of play
8. Field goals
9. Inadvertent Whistle