Fran, that means the CB does not have to cross the head string in order to make contact. If the OB's base is less than a diameter outside the head string, then the CB's base can be behind the head string when touching it.
pj
chgo
Yeah, Okay. I guess I was just confused by this line of Bob's.
"Except when the object ball is out of the kitchen but by less than one ball diameter."
I thought he meant that it wasn't legal to shoot if it was less than a ball's width from the head string.