Genghis:
EASA 2010-2013 Rulemaking Programme - search for VLA.008.
IO540: Of course, it's not an issue with logics, since many VLA aircraft are equipped for night flying, but we are talking about EASA here, not about somebody with detectable minimum amount of common sense
As for IFR, I agree, I think Diamond composite IFR approved aircraft (DA40, DA42) have a metal sheet in the wings and horizontal stabilizator, while DA20 doesn't have it and it's thus highly unlikely it will ever be certified for IFR in IMC flying in Europe, which for me is common sense. The static discharging wicks are also must have (not only for composite aircraft, most metal aircraft have them as well).