Crash tests in the US are also technically on the honors system too, but NHTSA does test the most common models. But many they don't. For example, the Cybertruck.

Classification should be sufficient. Remember that LIDAR is invisible, so distraction or flash-blindness are not relevant, just health effects. Class 1 has already been thoroughly tested and deemed "safe even for long term intentional viewing." Class 2 is visible only, so any LIDAR systems above 5mW would be Class 3, which are deemed harmful to humans. You can put a Class 3 laser in public (see laser light shows) but the FDA regulations require an indicator and to give the public enough warning to get clear if desired. These restrictions are going to make anything but Class 1 LIDAR exceedingly difficult for use in automotive applications.