[Zepp]

Looking for an ASA rule reference on the following sitch. (Fast pitch)

Pitch is in the dirt in front of home plate, catcher tries to handle the pitch
but knocks it in the air in front of her over the plate. The batter does not swing on the ball's initial time past but she swings at the mishandled pitch which is now about waist high over the plate. The ball is hit into fair territory. BTW, there are no runners
on base. (If there were runners on base, then I would be inclined to call batter interference)

I am looking for an ASA rule reference on whether this is legal or illegal. (My gut instinct is that it is illegal)
Just looking for a rule to justify it.