FED Going to Mouth

[Lapopez]

In the "Preseason Guide" for baseball it is clearly stated "With a runner or runners on base, a pitcher who has engaged the pitcher's plate and goes to his mouth has committed a balk."

Case book 6.2.1 Situation B clearly indicates a pitcher has balked if while touching the pitcher's plate in the set position with runners on base he places his hand on his mouth and distinctly wipes off his pitching hand prior to touching the ball.

This year the rule book has as a "Point of Emphasis" going to the mouth and clearly says "going to the mouth while in contact with the pitcher's plate is a balk, not because the pitcher goes to his mouth, but because the action simulates the start of the pitching motion."

I've got the above ammunition to back up my calling of a balk in the above situations. Where is the justification in the rules book though? The newly "clarified" shaded text in the Penalty of 6-2-1e doesn't support a balk. I suspect your answer will be that the "simulates the start if the pitching motion" interpretation along with "continue the motion without interruption..." and "go to the set positon without interruption..." blah blah are all the reasons I need but I am not satisfied. Going to the mouth doesn't look like the start of the pitching motion to me. Is it sufficient for something to be clearly stated in the case book but not in the rules book to justify a call?