Metal fuel lines in cabin, and tank fill pipe

The Fiat has metal fuel lines running through the cabin - the fuel tank is mounted in the trunk behind the rear bulkhead and the metal lines are routed through the cabin along the driver's side frame rail.  Is this acceptable?  I suppose if it's not, I could get some metal tubing and reroute them under the floor, but that seems to make them more vulnerable to debris etc.

In addition, the parcel shelf just above the tank has a bunch of holes in it (was originally covered by the pressboard parcel shelf covering), and the filler pipe passes through the corner of the shelf and is mounted to the right pillar, above the window line (the tank cap is just behind the rear passenger vent window).  In keeping with the rule about a sealed bulkhead between the tank and the passenger compartment, I will weld plating or make hatch doors over the parcel shelf holes, but the metal fill pipe is a problem.  Can I just seal the hole around the pipe where it passes through the parcel shelf and leave the pipe mounted in its OEM location?