[seifrob]

We have quite simple situation in the E.U. Does your mod have E.U.approval declaration? No? So its illegal, you fail bi-annual inspection. Does it have declaration but its used beyond its scope? ( putting VW OEM lights on Renault car for example.), its illegal, you fail annual inspection. So every mod I did has to be removable on roadside, lightweight and harmless. Pulled over one time, removed my rear skirts as asked. But even here there must be loopholes, because sometimes I see modded cars a' la Wingo pixar character.

... Or maybe they remove all mods before inspection.