TTzero regs revert to FIM, so no-FFs allowed, shock [Or NOT!]

When I last attended the TT races, in 2016, I had a discussion with the University of Nottingham TT Zero team about taking advantage of the more relaxed TT Zero regs to run a bike with better aerodynamics than all the conventionally-faired bikes. They said they'd discussed it and wanted to try it, but had been put off the idea by the powers-that-be who had implied that they probably wouldn't allow such a creation to pass scrutiny, so it wouldn't be allowed to race.
(They got on the podium anyway, which was great, after John McGuinness had trouble with his Mugen, relegating him to 4th).

Now (May 2018) in the run-up to the 2018 TT Zero electric race, I've had a further discussion with the UoN team, via their Facebook page. Once again, I lamented the fact that, with the exception of the Agni team in 2010, no-one has ever taken advantage of the more relaxed aero regs for TTzero. I posted the links from this site of both the 2010 Agni:
and the mocked-up image that Royce Creasey created, of an FF on the TT course, back in 2010:

Miquel Gimeno-Fabra of UoN responded with a simple and rather depressing message: "Check the regulations for 2018, they are the same as for normal IC bikes and we have written confirmation from the organisers banning TT Zero bikes from using dustbin fairings"
If the regs are "the same as for normal IC bikes" that means no fairings beyond the front axle or behind the rear axle, and the requirement for the rider's back to be visible from the rear.
This is a great shame, and the opposite of progress IMO, since it clearly amounts to a ban on FFs. PNB

UPDATE: Many thanks to Michael Moore for this insight:

MM: "Appendix F covers TTZero. They do allow FFs to have rear bodywork that doesn't exceed the top of the rider's head. Bodywork must protrude no more than 50mm in front of the front tire or 200 mm behind the rear tire. This seems to be the same as in the 2017 regs, and both years require full visibility of the rider from the side excepting forearms/hands. Hips may be obscured in the seat no more than 150mm. There doesn't seem to be a requirement about visibility of the front wheel/tire, but side area to the rear of the rider must be at least 20% greater than the area in front of the rider.
So I'm not seeing a big change. Dust bins are still legal but you can't hide the legs inside the bodywork."

PNB: So, one can only conclude that someone just doesn't like the idea of anything as unfamiliar and outrageous as an FF taking to the TT course!

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Lateral Thinking

Why not make the fairing and bodywork from Perspex or some other transparent material, surely this would deliver full visibility?

Alernatively have a smooth surface cooling radiator that is aerodynamically shaped along the length of the body?

Martin, most rule books

Martin, most rule books prohibit the use of transparent materials to try and circumvent the rider/machine visibility rule.