the Citroën DS and Ferrari Daytona, now had to be equipped with uncovered headlamps for the US market, further altering the look of European models sold in the United States. The change meant that vehicles designed for solid aerodynamic performance could not achieve it for the US market.

In 1984, the department changed the rule to allow replaceable-bulb headlamps of nonstandard shapes. However, some automaker could equip