Comment by AnthonyMouse

> The claim is "our contraption is roadworthy", which implicitly includes claims regarding roadworthiness requirements, including emissions. This is literally how market availability works.

You can't get around the government demanding that someone else pay an unreasonable amount of money for data that only the government wants. If they think the value to the public of the testing is worth the cost then why aren't they paying for it? If it isn't worth the cost then why are they forcing someone else to pay for it?

> Group validation automatically validates all group members, therefore there are at most number of engines groups to test.

Unless the state requires you to test all 270 engine groups regardless of how many you're actually using.