They are regulations. It even says as much on the front!
If you think it’s fine to follow the rules of a third country, then crack on. In the unlikely event you end up in court, you’ll be expected to have followed the rules of this country.
You can legally drive in some US states at 15, but you won’t be allowed to do it here, no matter how much you might demonstrate you have the reactions of Max Verstappen, the IQ of Einstein and the maturity of David Attenborough