We should probably invade GermanyThe DCC rule:
Edge of Ball Determines Position at Head StringThe “base of the ball” rule does not apply at DCC. To be playable, object balls must be completely down table of the head string. This is determined by the EDGE of the Ball. The edge of the ball may not touch or overlap the head string, even if the base of the ball is completely down table of the head string. The decision of the referee is final.Even the Break Shot, the EDGE of the cue ball must be fully behind the head string.