4e DECIDING GROUPS ON AN OPEN TABLE.
Groups are NOT decided and the table remains open...
(a) On a break shot.
(b) On a foul shot.
(c) If taking a free shot after a foul.
(d) In a combination shot in which balls from both groups are potted.
After the break the table is open and players may play balls from either group. The black ball cannot be used as an on ball to pot an object ball, unless a foul has been committed and it is a free shot.
Given these exceptions, if a player pots a ball or balls from a single group the player is on that group for the duration of the frame. The opposing player is designated the opposite group.
