I've never seen a rule go into that much detail, but I think it works like this....
Let's say your cue stick weighs 20oz. If the cb is frozen to a line of 3 object balls (each 6oz), and all frozen in a straight line, the total mass of frozen balls, including cb, would be 24oz (4 x 6oz). If you shoot straight along the centerline of the line of balls, the 3 ob's (18oz) would be sent away immediately by the 19oz cue at about the same speed the cue is traveling at upon impact. But the cb would not move as quickly and would be pushed/shoved or double hit by the cue tip.
If the cb were frozen to only 1 or 2 ob's in a straight line, and you stroked straight along the centerline of balls, all the balls (cb and ob's) would take off at about the same speed as the stroke upon impact and the tip would not push or double hit the cb.
If there are multiple frozen balls in the cluster, a push or double hit can be avoided by shooting away from the centerline of balls to allow the cb an escape path. Not sure what the minimum angle would be, but I'm sure some pool physics gurus could come up with an answer for that.