I'm not the guy that posted that and I know nothing about the laws here or anywhere else. But...
We as drivers look at this as if my speedo says I'm doing 50 and I'm really doing 60 (understated), that's bad. I could get a ticket.
However, when looking at laws, they think differently. If you're speedo says' you're doing 60 and you're really doing 50 (overstating), that means that your odometer is also overstating. And that means that instead of your warranty being 36,000 miles your warranty is now only 30,000 real miles. Or, if it's a 36,000 mile lease, you get cheated out of 6,000 miles. To a lawmaker, that's bad.