NHTSA has ordered Tesla to prove that its Cybercab is even legal to sell. The agency issued a formal Special Order on September 10 demanding that the company show, under oath, how a vehicle with no steering wheel, no pedals, and no mirrors complies with federal safety standards written for human drivers.

Tesla has until September 30 to respond. Failing to answer fully and truthfully carries penalties of up to $139 million.

A pre-production Tesla Cybercab was spotted parked on a street in Berkeley, California, and it gives us the clearest look yet at how Tesla puts a steering wheel into a car it designed to have none.

The photos, shared with Electrek by reader Adam Machacek, show a Cybertruck steering wheel mounted on an exposed steering column that has been bolted into the two-seat robotaxi.