I think you'll find that if you interpret the rules correctly. Any fuel line that passes near the area you speak of, has other special instructions to follow. It reads something like this:
Fuel lines (except steel braided lines) in the
flywheel/bellhousing area must be enclosed in a 16-inch length of
steel tubing, 1/8-inch-minimum wall thickness, securely mounted as
a protection against fuel-line rupture. Fuel lines may not be routed
in the driveshaft tunnel.
