As of 2006, there was nothing in the USSSA rules saying it was illegal to leap over a defensive player. There is also nothing regarding that in OBR, which is what USSSA plays under. In FED, leaping or jumping a player not lying on the ground is illegal.
So unless there has been a USSSA rule change since last fall, I would say your regional director has misinterpreted the rule, especially if he has brought the FED rule book into the picture.
However, since he is the regional director, can he technically be wrong?