As far as I know it is this
6. OPENING BREAK. Starting player must either
(1) designate a ball and a pocket into which that ball will be pocketed and accomplish the shot, or (2) cause the cue ball to contact a ball and then a cushion, plus cause two object balls to contact a cushion. Failure to meet at least one of the above requirements is a breaking violation. Offender's score is assessed a two point penalty for each breaking violation. In addition, the opponent has the choice of (1) accepting the table in position, or (2) having the balls reracked and requiring the offending player to repeat the opening break. That choice continues until the opening break is not a breaking violation, or until the opponent accepts the table in position. The three successive fouls rule does not apply to breaking violations.
If the starting player scratches on a legal opening break, he is charged with a foul and assessed a one point penalty, which applies toward the "Successive Fouls Penalties." The incoming player is awarded cue ball in hand behind the head string, with object balls in position.