NFHS emphasis on elbow contact

[Adam]

B1 in the lane guarding A2. As A2 drives into the lane, he runs over a stationary B1, still facing away.

What's your call?

What if, at the last second, B1 spins around on one foot, now actively guarding A1. He doesn't get his other foot down before A1 plows over B1, who is stationary.
Call?

LGP does not apply to a stationary defender.

I can't find where it says a defender with a foot on the line doesn't have a legal position on the court, only that he doesn't have LGP. There's a difference.