Still somehow police stops only cars with 3 wheels. In Estonia rally cars have special plates and are road legal, but driving on 3 wheels is not legal.
Banning spectators has been the stronger Covid impact in Rally; events depending on tickets sale have little chances to go on and those supported by local
Of course it is not legal. Also, is it legal to drive a car with a roll-cage, a car with high emmissions, a car without MOT tyres, a car with racing seat