3 seconds interpretation

[Camron Rust]

As Adam said, it is specifically mentioned.

While it is slightly different, a player is considered in the lane during a FT if any part of their leg/foot breaks the plane regardless of whether it touches or not. Breaking the plane with any other body part doesn't put a player in the lane unless they touch the floor in the lane.

For 3 seconds, it is similar. The point of the restriction is to prevent a large/tall player from skirting the 3-second rule by effectively staying in the lane. If they get both feet outside the boundary, it isn't much more to touch.

Not sure why the difference in the two situations. They could have made them both the same to keep the concept simpler.