I remember writing that rule allowance.
Good that you asked though John.
And Lizard, whats up with just doing WTF you want because safety?

Here's another way of thinking about it: (Assuming the ITAC didn't proactively -(we did it with no letter request IIRC) make an allowance) If you can't have adequate egress that satisfies your sense of safety, maybe another car /seat/setup is the better answer than just doing whatever you feel like, rulebook be damned????