Tesla’s Cybercab, a distinctive two-seater without a steering wheel or brake pedals, is set to start picking up members of the public in two states. But the vehicle is already under investigation by the US federal government, which is probing whether it meets federal safety standards.

The investigation comes just hours after the electric automaker welcomed hundreds of fans to downtown Austin to ride in the driverless Cybercabs. Tesla plans to deploy the vehicles on its Robotaxi ride-hail network, which is currently operating in a handful of cities in Texas and Florida.

The National Highway Traffic Safety Administration is updating vehicle standards to make it easier and faster for driverless cars to deploy on public roads. It’s currently tweaking eight rules, including those requiring car parts that driverless cars don’t really need: brake pedals, windshield wipers, and rearview mirrors. But for now, years-old standards remain in place.

Meanwhile, unusually shaped robotaxi companies have been told to apply for an exemption from federal rules before they start picking up passengers. Amazon subsidiary Zoox, whose vehicles do not have steering wheels or manual controls, won the first of these exemptions this summer, which limits its operations to 2,500 vehicles this year.

Tesla, however, has said it doesn’t need an exemption because its vehicles comply with all existing safety standards.