The 2007-08 NBA season brings some minor rules changes regarding instant replay, flagrant fouls and resetting the shot clock.

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 what situations trigger the use of instant replay or under what circumstances the 24-second shot clock is reset? 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.

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.