After scouring the internet, I haven't managed to find if a fuel level gauge is a requirement for the SVA.
If it is does it have to be dash mounted?
Thanks in advance.
I've just re-read the IVA M1 2020 manual, and that's the same - fuel level indicator is not required, but if it does have one (or a low-fuel warning light), it must work correctly, and should use a standard symbol to identify what it is.