[NFHS] Violation on free throw shooter?

[Afrosheen]

My question is can a free throw shooter step on the line without fully crossing it?

The NFHS rulebook states this [9-1-3-e]: "The free thrower shall not have either foot beyond the vertical plane of the edge of the free-throw line which is farther from the basket or the free-throw semicircle line."

According to that, the answer is no, the free throw shooter cannot touch any part of the line.

But others have said that the shooter can touch the line but not completely cross the line — as in cannot cross the edge of the line that is closest to the baseline, which I cannot find in the rulebook. So I don't know whether I'm missing something or not.

Any consideration to clarify this is greatly appreciated.