To execute a legal break, the breaker, with the base of the cue ball behind the head string must either

  1. Pocket a ball.
  2. Drive at least four unique numbered balls to a cushion.

    NOTE: In the event a shooter places the base of the cue ball over the head string the opposing shooter must call it before the break shot is made, not after.

If the shooter performing the break shot, during their stroke, completely misses and makes no contact with the cue-ball (basically a "swing and a miss"), this is not considered a foul and the shooter may try the break shot again.