nonsense the laws are pretty gertrude stein i.e. a foul is a foul is a foul
the only subjectivity should be does the ref think it is a foul and that should be the same all over the pitch
where does it say that in the laws? the laws of the game when setting up what is a foul don't specify different areas of the pitch and their effect on if it is a foul. This is what causes confusion