Frozen balls

For a foul to result from failure to legally strike a rail after contacting a frozen ball, the ball in question must be inspected and designated as frozen prior to a players shot, otherwise the ball is not considered frozen. If the cue ball becomes wedged between an object ball and the cushion and frozen to both, then legal shot requirements must be met by pocketing the frozen ball, or by contacting either another ball or another cushion enroute to a legal shot. Failure to do so is a foul.