According to the rules listed at
onepocket.org
6. Fouls
6.1 Unless otherwise announced by the tournament director, One Pocket is played according to the World General Rules 1.16.1, ‘
cue ball fouls only’. In the event that a player accidentally moves a ball, the opponent may elect to have the disturbed ball remain in its new position or be restored to its original position. When balls are restored, they shall be placed as close as possible to their original positions, with no advantage to be gained by the offending player. If no official is available to restore disturbed balls, then the players must come to agreement on satisfactory replacement of the disturbed balls prior to continuing play.
6.2 Any scratch or foul results in the end of the shooter’s inning, as well as a standard one ball penalty. All balls pocketed in the shooter’s pocket as a result of a stroke that includes a foul do not count for the shooting player and are to be immediately spotted, along with the standard one ball penalty. Also, any balls pocketed in the opponent’s pocket on a stroke that ends in either a pocket scratch or with the cue ball off the table are not to be counted for the opponent, and are to be immediately spotted. However, on a stroke when any other foul is committed (such as a push shot, double-hit or illegal ball contact), any balls scored into the opponent’s pocket are to stay down and be counted for the opponent.
6.3 Following either a pocket scratch or the cue ball jumping the table, the incoming player has cue ball in hand behind the head string. Following any other foul, the cue ball is played where it lies.
6.4 If the offending player has no balls to spot, then they will owe one for each such scratch, which must be repaid by spotting at the end of the first inning or innings in which they score. All owed balls must be repaid before any pocketed balls count towards a player's game score.
Typically, any owed scratches are indicated by placement of a small coin on the rail top adjacent to the offending player's pocket. An additional coin is placed to represent each additional scratch without a scored ball to spot. One coin is removed for each owed ball repaid by spotting at the end of the first inning or innings in which they are scored, until all owed scratches have been repaid, and standard scoring can commence.
6.5 Driving either the cue ball or an object ball off the table is a foul, whenever either comes to rest off the playing surface, or comes in contact with anything other than the table itself while airborne.
Please note that One Pocket has been traditionally played in many areas without a foul charged for jumping an object ball off the table, contrary to current general pocket billiards rules; therefore it is important to verify house rules or your tournament director's interpretation prior to an important match.
6.6 Intentional fouls are an accepted part of One Pocket tactics as long as they are played by use of a legal stroke, such as by lightly touching the cue ball with the cue tip; by rolling the cue ball to a new location without regard for legal contact with either an object ball or a cushion; by pocket scratching the cue ball; or by using a legal jump technique to force the cue ball off the table. However, if the acting official rules that a player has used an illegal technique to direct the cue ball or any object balls to a more desirable location, then the incoming player has the option of either playing the balls where they lie, or requesting the official to restore all such moved balls to their location prior to the illegal maneuver. The offending player is charged the standard one ball foul penalty, and in addition may be further penalized at the discretion of the acting official under the general rules of unsportsmanlike conduct.
6.7 It shall not be a foul to accidentally touch the cue ball while removing an object ball from an adjacent pocket, or when spotting a ball where the cue ball interferes. It shall be a foul for the incoming shooter to accidentally touch an object ball with the cue ball while placing it in a ball in hand situation.
Now... nothing is stated about hitting a moving ball with your cue. My
guess would be it would be the incoming players choice as to leave it where it is, or try to replace it where they think it would have been.
