Oh I agree 100%. In Germany we have extremely strict (and sometimes ridiculous) rules when it comes to cars and modifying them. The system basically allows modifications only with parts that are officially approved for the specific model of car. Most aftermarket stuff comes with a pre-approved technical component report, so you just need to hand it to the inspector and they will register it to your car for like 50 Euros. If a part doesn’t have a report, you can have the inspection service make one, but, depending on the part, this can be very expensive. If you’re lucky, someone else has already done the modification before and a custom report exists which you can use.

In case with EFI systems you will most likely not be able to use a existing report because the tune is always different. So you’ll have to get one made just for the tune your car is running on, which again, is very expensive and a major hassle.