Crow Hopping and Replanting of the pivot foot are still illegal.
Fall White Page Rules
Rule 13-C (updated sections)
e)Any step back with the non-pivot foot must begin before the start of the pitch (13.C.1.d). The pitcher cannot step back a second time, if their foot was already behind the pitching plate, prior to the start of the pitch. Once the pitch has started (the hands separate), the pitcher shall take not more than one step which must be forward and within the 24” length of the pitching plate, toward the batter and simultaneous with the underhand delivery of the ball to the batter. EXCEPTION: When removing self from the pitcher’s position
f)The pivot foot must remain in contact with the pitcher’s plate or push off and drag away from the pitcher’s plate or be airborne prior to the non-pivot foot touching the ground. The pitcher may leap from the pitcher’s plate, land with the non-pivot foot and with a continuous motion deliver the ball to the batter. The pivot foot may follow through with the pitcher’s continuous motion.
i.The pitcher’s push off to drag, or leap must start from the pitcher’s plate. The pitcher must not crow hop or push off from any place other than the pitcher’s plate. The pitcher cannot replant her pivot foot before delivering the pitch.
ii.All movement of the pitching arm must be continuous as the pitcher steps, pushes or leaps from the pitcher’s plate.
