Agreed: "Contact John Pagel" is the answer.
My thoughts (not that my opinion matters in any way):
The cited section discusses fuel lines which are no longer in the driver's compartment; that section is therefore moot; however, there's a 'General Fuel System Regulations' section which applies.
I think the only difficulty is the line in 3.8.1 [excepted below]:
[snip] OE tanks must retain all OE systems (filler, mounts, vents, etc.); all OE tanks and systems must be wholly unmodified.
The above section discusses vents, fillers, and mounts, but doesn't mention fuel lines; it may be that lines going to the engine are considered separate, because they are _after_ the fuel tank 'system'.
There is also the following, which contemplates aftermarket components, and specifies certain appropriate characteristics:
3.8.4 Fuel Cell Installation. [snip] All aftermarket fuel components must use threaded fittings and appropriate hose types, and must include all appropriate racecar-quality vents, valves, and other safety features. Fuel cell installations will be judged on their overall execution and apparent safety.
3.8.4.4 Fuel Lines in Cockpit: In addition to complying with Rule 3.6.6., any non-OE fuel lines that are exposed to or pass through the driving compartment must be either fuel hard line or stainless braided fuel hose and must also be encased by heavy-duty conduit, durable steel or aluminum pipe, or strong metal plate. OE metal lines in good condition in their original location are exempt from this rule, but encasement is still recommended.
All the above reads to _me_ that:
if you choose appropriate parts from the above specified characteristics, and mount, protect, and secure them appropriately, you should be good to go.
I'm guessing vinyl tubing and ill-fitting hose clamps are an immediate fail; that'll probably work for a lawn tractor (though you may not want it there, either), but not for a racecar.
But, again:
"Contact John Pagel" is the answer.
Also, it seems you'll have plenty of great pictures to reference