NBA Instant Replay Question

[tmagan]

I remember when instant replay was brought to the NBA it was stated that shots at the end of the fourth quarter and the end of any overtime period would be reviewed only if the affected the outcome of the game. I first saw this at the end of a Nets game last year and now tonight's Wizard/Bulls game a shot at the end of the fourth quarter was reviewed even though it didn't affect the outcome of the game. When was this policy changed?