In light of last night's fight between the Knicks and the Nuggets, the Denver Post has published the NBA rules regarding fights, courtesy of nba.com

NBA's rules regarding fights

SECTION VI: FIGHTING FOULS

A. Technical fouls shall be assessed players, coaches or trainers for fighting. No free throws will be attempted. The participants will be ejected immediately.

B. This rule applies whether play is in progress or the ball is dead.

C. If a fighting foul occurs with a team in possession of the ball, that team will retain possession on the sideline nearest the spot where play was interrupted but no nearer to the baseline than the free-throw line extended.

D. If a fighting foul occurs with neither team in possession, play will be resumed with a jump ball between any two opponents who were in the game at the center circle.

E. A fine not exceeding $35,000 and/or suspension may be imposed upon such person(s) by the commissioner at his sole discretion.

SECTION VII: FINES

A. Recipients of technical fouls for unsportsmanlike conduct will be assessed a $500 fine for the first offense, and an additional $500 for the second offense in any one given game, for a minimum total of $1,000. If a player is ejected on (1) the first technical foul for unsportsmanlike conduct, (2) a punching foul, (3) a fighting foul, (4) an elbow foul or (5) a flagrant foul, he shall be fined a minimum of $1,000.

B. Whether or not said player(s) is ejected, a fine not exceeding $35,000 and/or suspension may be imposed upon such player(s) by the commissioner at his sole discretion.

C. During an altercation, all players not participating in the game must remain in the immediate vicinity of their bench. Violators will be suspended, without pay, for a minimum of one game and fined up to $35,000. The suspensions will commence prior to the start of their next game. A team must have a minimum of eight players dressed and ready to play in every game. If five or more players leave the bench, the players will serve their suspensions alphabetically, according to the first letters of their last name. If seven bench players are suspended (assuming no participants are included), four of them would be suspended for the first game following the altercation. The remaining three would be suspended for the second game following the altercation.

D. A player, coach or assistant coach, upon being notified by an official that he has been ejected from the game, must leave the playing area IMMEDIATELY.

Source: NBA.com