From this date, the formula was for 3.5-litre normally aspirated engines of no greater than 12 cylinders, which was a direct consequence of lobbying by Ferrari for the previous few years.
A partir desta data, a fórmula 1 foi para motores de 3´5 litros de aspiración atmosférica que non superaban os 12 cilindros, resultado directo das presións de Ferrari nos últimos anos.