On an regular basis, either annually or semi-annually, in the US (certainly in California), your highway vehicle must pass a "smog check". You know, the dreaded visit to the "smog check" shop where if your car passes, you only waste 1 hour of your life, but if it fails, there goes a month. They have the same thing in the EU, it's called ITV (Inspeccion Tecnica de Vehiculos), aka Vehicle Technical inspection. Like in California, you have to have your highway vehicle inspected on a regular basis. The...