Texas Express 9 ball rules
2.3: Ball Tapping During Racking
Attempting to freeze numbered balls in a particular position by tapping or striking them with the cue ball, another ball, or any foreign object is called ball tapping, and is not permitted at any time, including during practice on a tournament-designated table. A player may or may not be issued a warning for ball tapping before the infraction is declared a foul; if determined to be a foul, the penalty is the loss of one game per incident. Only the tournament director reserves the right to tap numbered balls.
2.3: Ball Tapping During Racking
Attempting to freeze numbered balls in a particular position by tapping or striking them with the cue ball, another ball, or any foreign object is called ball tapping, and is not permitted at any time, including during practice on a tournament-designated table. A player may or may not be issued a warning for ball tapping before the infraction is declared a foul; if determined to be a foul, the penalty is the loss of one game per incident. Only the tournament director reserves the right to tap numbered balls.