The US FedGov actually made an exception to one of their rules… an exception in favor of progress, entepreneurship, American business and advanced technology.
The Transition was designed as a “light sport” aircraft, the smallest kind of private aeroplane under FAA classification, with a maximum weight of 1,320lb. But the manufacturers found it impossible to fit the safety features – airbags, crumple zones and roll cage, for instance – that are required for road vehicles into that weight.
Uniquely, however, the FAA has granted the Transition an exemption – allowing it to be classified as a light sport aircraft despite being 120lb over the limit.
Light sport aircraft licences require just 20 hours’ flying time, making them much easier to obtain than full private licences.