(2) A federal vehicle safety standard that conflicts with an equipment provision of the vehicle code applicable to the same aspect of performance shall supersede that specific provision of the vehicle code with respect to vehicles in compliance with the federal vehicle safety standard that was in effect at the time of sale. [1983 c.338 §435; 1985 c.16 §228; 1989 c.402 §2; 1991 c.67 §221; 2003 c.14 §497; 2003 c.158 §1]