Crow Hop or Leap Definition

Question
What constitutes a "crow hop" or "leap" while pitching?  We play 12U using USSSA rules and there is one girl, who to me, is blatantly violating the crow hop or leap rule for pitching.  If I interpret it correctly, if the pitcher's pivot foot leaves the pitching plate during her delivery and DOES NOT remain in contact with the ground, then she is utilizing the crow hop/leap pitching method.   Also, if she is pushing off with her pivot foot at a place other than the pitcher's plate, it is a violation.  Is that a correct interpretation?  I have mentioned this to one ump who said it was illegal and one who said it was not.  The head of the umpires has ruled it is not illegal either.  How can I get them to reverse their decision?  I don't even see this as a judgment call.  Your pivot foot is either on the ground or in the air when you deliver.  I would hate to file a protest so as to look like a case of sour grapes.  Thanks

Answer
You don't have to protest.  Simply purchase or printout the rulebook from the usssa.com website.  Rule 7E-C plainly states this is illegal.  Crow hop and Leap are also clearly defined in the rule book.  Present these rules to the head umpire if he is denying it is illegal.  He has one of two choices, either agree with you and rule in your favor, or rule that he doesn't believe her drag foot is loosing contact with the ground.  If he admits it is, then he has no option but to rule the pitch illegal.  I wish you luck.  Here is the link to the rule book:

http://www.usssa.com/usssa/usssa-general/SixthEditionRuleBook.pdf

Coach Mike