Ok, please forgive me if my wording is very aukward (yes, English is my first language and Spanish is my second... and yes... I am Hispanic going for French as my 3rd language and Dutch and German as my intermediate 4th and 5th languages when I head to California next summer.
) but when I see Xavier G. play balkline, I wonder how is it that a balk is or is not a foul? For instance: say that all three balls are on a corner section of a balk zone. When the game is... say... 47cm.2, is the 2 like one straight rail carom and then the next shot, one ball has to be out of the balk zone or is it two straight rail caroms (even though I got the ideal answer already, I still need more elaboration)? Another thing that catches me is that when a ball is out of the balk zone and comes right back into the same balk zone, does this mean that it is still a valid shot and a reset to 2 again?
I hope you guys can catch my drift here..... if not, please reply back for more elaboration.

I hope you guys can catch my drift here..... if not, please reply back for more elaboration.