fuel cells, bulkheads, and hatchbacks

Car and Driver recently posted their Lemons Prelude Fuel Cell install on YouTube, and another one of my forums is questioning the rulebook.

http://www.youtube.com/watch?feature=pl … bQVmXzeKhA

there is no bulkhead readily apparent at their backseat hole (i guess, on my phone it didn't look like there was), however, it does look like  they are running an ATL box and accessories.

in my view, the phrase "If the fuel tank can't be completely separated from the cockpit by metal panels, a metal-encased, FIA-certified fuel cell with all related compliant fittings must be used." means that the ATL box is good enough, and that an additional bulkhead is not mandatory.

in other views, the phrase "if the fuel tank is in the trunk area, any openings between the trunk and the cockpit must be permanently sealed with bolted, riveted, or welded metal panels." includes the ATL box as a "fuel tank", and would demand a bulkhead since one could be fitted (which negates the if in the statement above)

looking at a non-trunk car like our civic hatchback.....is the ATL box enough of a bulkhead (meaning the "fuel tank" is technically the bladder) or would we need another bulkhead above and beyond the ATL box?