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Official Rules of the NBA

The 2009-10 NBA season brings expanded use of instant replay by NBA referees.

Now that you're up to speed on the changes, time to refresh yourself on the old ones. Sure, you know your twos from threes, a blocked shot from a personal foul, but how well do you really know the NBA rules? For example, do you know that instant replay can be used at any point during a game to determine whether a field goal was correctly scored as a two- or three-point field goal? You can now by checking out the league's official rules as well as those most often misunderstood. Use the links below to navigate the NBA's 2007-08 rule book and case book, which contains questions and answers to the rules.

Ask Bernie: Backcourt violations & expanding replay

Bernie Fryer, Vice President and Director of NBA Officials answers the latest batch of rules questions from NBA fans. Read Article

Ask Bernie: Do referees wait to call fouls?

Bernie Fryer, Vice President and Director of NBA Officials, takes questions about this very important rule. Read Article

Making the Call: Offensive Foul

Watch as Chris Paul is whistled for an offensive foul you may not have seen before.
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Making the Call: In the Cylinder or Not?

Ronnie Nunn helps you understand how referees determine whether a ball is in the cylinder or not.
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Making the Call: 3-Point Video Replay

Ronnie Nunn, the Director of Development for Officials, explains the new 3-point video replay rule.
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Collective Bargaining Agreement

What's a Mid-level Exception? How long can a free-agent contract be? How about a rookie contract? The answers to those questions and more can be found in the collective bargaining agreement that was signed in 2005 and runs through the 2010-11 season.

2009-10 Key Dates

Oct. 26, 2009 - Rosters set for opening day
Oct. 27, 2009 - Start of 2009-10 regular season
Feb. 12-15, 2010 - All-Star weekend, Dallas
Feb. 18, 2010 - Trade deadline, 3 p.m. EST
April 14, 2010 - Regular season ends
May 18, 2010 - Draft lottery

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