> Under the MPBA rules,which pre-date Texas Express,any balls pocketed on a break that results in a foul (scratch,jumped cb/ob off table),come back up on the spot in numbered order. If the one ball is behind the head string,it also respotted. The cue ball would be "in hand" to the incoming player,but the cue ball placement would be confined to anywhere behind the head string,similar to common 8-ball. All fouls after that were traditional "in hand" rules.
One slight advantage to this format is that regardless of how many balls were made on the break,the incoming player had all 9 balls to deal with,some of which might be tied up on the spot. This meant that unlike today's 9-ball at the world-class level,a scratch on the break isn't a nearly automatic loss.
This can also be considered a serious disadvantage because it truly penalizes the incoming player for their opponent's mistake of scratching on the break.
Some players I'm told would make no effort at all to control their rock,knowing that balls would be tied up even if they scratched.
It was also fairly slow-paced,with a lot of moving and safety play,employing moves you just don't see much under any other rules. Texas Express was the next evolution. Tommy D.