Pitcher's Stride "Within" the 24" Plate

[BretMan]

Question about the pitcher's forward stride being "within" the 24" length of the pitcher's plate.

NFHS rules state that the stride must be "within, or partially within" the 24" length of the pitcher's plate. They even have that nifty diagram to illustrate foot placement, which shows the stride foot touching the the (imaginary) line and being legal.

ASA rules state only that the stride foot must be "within" (not "partially within") the 24" length.

Does the ASA interpretation of "within" match the NFHS, or must the foot be fully within the line without touching it?